Question

The population of a town has been decreasing By 5% each year for the last two years the current population of the town is 1510 people what was the population two years ago

Answer 1

First start with your starting value which is 1510 and then get the multiplier.. to get the multiplier for a precent decrease you have to subtract it from 100%.. once you’ve got the multiplier you put it into the equation and because it’s asking for 2 years ago you make the exponent -2