Question

what are two expressions that show how increasing by 55% is the same as multipying by 1.55

Answer 1

If something increases by 55% it means its value becomes 100+55=155%. But 55% is 55/100=0.55 and 100% is 100/100=1. So when something increases by 55% it increase by 0.55, added to its original value, represented by 1, increases to 1.55 times the original value.