Kevin weighed 200 pounds when he started his diet and lost 40 pounds. What percent of his original weight did Kevin lose?

A : 40%
B: 50%
C : 20%
D: 30%

C 20%

Step-by-step explanation:

if you where to devide in half you would get 100 pounds and 20 lost from there 20 is 20% of 100  

one that is bigger than 3 1/2

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.