I think it was 500% because it started with 2000 non natives and then went to 15000.
Harley is 15 years less than seven times Marcy's age, so that means Haley + 15 = 7 * Marcy
Equation: (41 + 15) / 7 = 56 / 7 = 8
Marcy's age is 8.
Hope this helped =)
You just have to multiply the percentage by the amount:
(150/100)×$63
1.5×$63= $94.50
If you aren't allowed a calculator, then just find half of $63 (the 0.5 of the fraction) and add it to $63 (the 1. of the fraction).
$63÷2= $31.5
$63+$31.5= $94.50
