Question

I WILL GIVE BRAINLIEST By what percent will the product of two numbers change if one of them increased by 20% and the other decreased by 20%? I already know that it becomes smaller but the number I don't know! Please help, and show work

Answer 1

Answer:

Step-by-step explanation:

%change=100(final-initial)/initial

%change=100(1.2(0.8)ab-ab)/ab

%change=100(.96-1)

%change=-4%

So the product is decreased by four percent.

Answer 2

Answer:

Assume that the number is 100. Then, 20% of 100 is 20×100100 = 20. Increasing 100 by 20% means increasing 100 by 20 and the resultant number is 120.