if 82% is 64,what about 90%

Question

 i really dont know maths pls help me.

is there anyways to do this on a calculator?

Answer 1

The problem is telling you that 82% of some number is 64. So we need to figure out what that number is. Set it up as so:

 

0.82*(X) = 64

 

Solve for X by dividing both sides of the equation by 0.82:

 

X = 64/0.82

X = 78.049

 

Next find what 90% of that number (X, which is 78.049) is:

 

0.90*(X) = ???

0.90*(78.049) = 70.244

Answer 2

Enter 64

Hit ÷

Enter 0.82

Hit =

Hit x

Enter 0.90

Hit =