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As a guide, the report says contributing 3 per cent of take-home pay into superannuation from age 25 onwards will typically increase your retirement income by 25 per cent.

If you delay making super top-ups until age 45, you may need to contribute as much as 18 per cent of your take-home pay

The gear ratio is the relationship between the number of teeth on two gears that are
meshed or two sprockets connected with a common roller
chain, or the circumferences of two pulleys
connected with a drive belt.

General description

In the picture to the right, the smaller gear has thirteen teeth, while the second, larger gear has twenty-one teeth. The gear
ratio is therefore 13/21 or 1/1.62 (also written as 1:1.62).

The first number in the ratio is usually the gear to which power is applied. In an automobile
the first number is the gear receiving power from the engine.

This means that for every one revolution of the smaller gear, the larger gear has made 1/1.62, or 0.62, revolutions. In
practical terms, the larger gear turns more slowly.

Suppose the largest gear in the picture has 42 teeth, the gear ratio between the second and third gear then is; 21/42 = 1/2
and for every revolution of the smallest gear the largest gear has only turned 0.62/2 = 0.31 revolution, a total reduction of
around 1:3.