Question

By how much should 100 be decreased to get 18. 8

Answer 1

here is your answer....
the number is 81.2
hope this helps you...

Answer 2

Let the No decreased = x

Now,

100 - x = 18.8

-x = 18.8 - 100

-x = -81.2 (Cut -)

-x = 81.2