Answer:
27 days
Step-by-step explanation:
Well, there's two ways we could do this (which I do). One way is easier with a calculator, one is useful when you cannot use a calculator.
EASY CALCULATOR METHOD
30% as a decimal is 0.3, so if you multiply 90 by 0.3, you can easily find 30%. So:
90 x 0.3 = 27 days.
NON CALCULATOR METHOD
To find 10% of something, we divide the original value by 10. Therefore, we just need to find 10% and multiply that value by 3 to get 30%. So:
90/10 = 9 days (10%)
9 x 3 = 27 days (30%)
Either way both give you the same answer of 27 days.
