This is possibly the silliest question ever..

Start here. Note the size of a single serving and how many servings are in the package.

Check total calories per serving. Look at the serving size and how many servings you’re really consuming. If you double the servings you eat, you double the calories and nutrients, including the Percent Daily Value (% DV).

Limit these nutrients. Remember, you need to limit your total fat to no more than 56–78 grams a day — including no more than 16 grams of saturated fat, less than two grams of trans fat, and less than 300 mg cholesterol (for a 2,000 calorie diet).

Get enough of these nutrients. Make sure you get 100 percent of the fiber, vitamins and other nutrients you need every day.

Quick guide to % DV. The % DV section tells you the percent of each nutrient in a single serving, in terms of the daily recommended amount. As a guide, if you want to consume less of a nutrient (such as saturated fat, cholesterol or sodium), choose foods with a lower % DV — 5 percent or less is low. If you want to consume more of a nutrient (such as fiber), seek foods with a higher % DV — 20 percent or more is high.

Here are more tips for getting as much health information as possible from the Nutrition Facts label:

Remember that the information shown in these panels is based on 2,000 calories a day. You may need to consume less or more than 2,000 calories depending upon your age, gender, activity level, and whether you’re trying to lose, gain or maintain your weight. Find out your personal daily limits on My Fats Translator.
In general, as you think about the amount of calories in a food per serving, remember that for a 2,000-calorie diet:
40 calories per serving is considered low;
100 calories per serving is considered moderate; and
400 calories or more per serving is considered high.
There is no % DV shown for trans fat on the panel because the U.S. Food and Drug Administration (FDA) does not have enough scientific information to set this value. We recommend eating less than 20 calories or (less than two grams of trans fat) a day – that’s less than 1 percent of your total daily calories (for a 2,000-calorie-a-day diet).
When the Nutrition Facts panel says the food contains “0 g” of trans fat, it means the food contains less than 0.5 grams of trans fat per serving.
When the Nutrition Facts label says a food contains “0 g” of trans fat, but includes “partially hydrogenated oil” in the ingredient list, it means the food contains trans fat, but less than 0.5 grams of trans fat per serving. So, if you eat more than one serving, you could quickly reach your daily limit of trans fat.

In addition to the Nutrition Facts label, a lot of foods today also come with nutrient content claims provided by the manufacturer. These claims are typically featured in ads for the foods or in the promotional copy on the food packages themselves. They are strictly defined by the FDA. The chart below provides some of the most commonly used nutrient content claims, along with a detailed description of what the claim means.

I'm an Aussie too and also use an online converter to make sure the calories recorded here in MFP are the same as what's on the packet. Also, if you're using an iPhone like I do, you can scan the item in when logging your food. Just a thought. Some of the items, like Red Bull for example, show several different options but one says "Australia" afterwards....usually someone has already done the converting for you in these ones but I check anyway

Your opening post made sense to me - but I am Kiwi and new to this nutritional kick thing so maybe that is why.

The colourful image above is really useful though it is based on US information.

The % you see is the percentage of your daily intake for 1 serving of whatever if your daily intake is 8700 kj.

The nasty trick is most packets seem to be more than on serving. They are often random amounts like 1.3 servings or 2 servings.

Search foods on here and use either AUS or NZ to help find brands that are familiar to you and using metric measurements.

Also it seems like noone answered your other question so ill go ahead. It has helped me a great deal cutting my bread significantly from my diet. Every now and then I'll allow myself a slice for toast, but its not an everyday thing. I would suggest eating bread in moderation.