Question

Benny is 12 years old. He is currently 200% of his sisters age. What percent of Benny's age will his sisters age be in 4 years?

Answer 1

If Benny is 12 right now, that means that he is twice his sisters age because he is 200% of or 2 times his sister's age. His sister right now is 6 years old then. 
After 4 years, Benny will be 16 (add 4 to 12) and his sister will be 10. 
To find the percentage,divide his age by his sister's age and make it a percentage.
16/10=1.6=160%
Hope this helps.