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The overall effect is a loss of 1 kg, which is 1% less than the starting value.

Effect of repeated percentage change

The effect of repeated percentage change is very rapid growth in the value being measured. This is referred to as exponential growth.

This branch of mathematics is used wherever a percentage rate of change is present, such as the following.

• In banking and finance – to calculate compound interest and mortgage costs.

• In pandemic modelling – where the R-value simulates the spread of a virus.

How 1000 cases would increase under different infection rates.

How 1,000 cases would increase under di erent infection rates