Question

When a number is decreased by 10% of itself, the result is 27. What is the number?​ Write an equation to model the problem

Answer 1

Answer: $x-0.1x=27$

Step-by-step explanation:

Let x be the number that gets decreased by 10% of itself.

x decreased by 10% of x is 27.

x is 100%, so 100%-10%=90%

So, 90% of x equals 27.

90% = 0.9

0.9x = 27

x = 30