percent means parts out of 100 5%=5/100=1/20 so now we have 1/20 times total sale=125 multiply both sides by 20 to clear fraction 20/20 times total sale=2500 1 times total sale=2500 total sale=2500 answer is total sale=$2500<span />
If the population quadruples every period say hour, that means the "rate of growth" is 300%, so whatever the current amount, increased by 3 times as much is 4 times the current amount, or a quadrupled amount.
