[求助]42套中Section5 Q-12

MONTHLY KILOWATT HOURS

12. The table above shows present rates

and proposed rates for electricity for

residential customers. For which of

the monthly kilowatt-hours shown

would the proposed rate be the

greatest percent increase over the

present rate?

(A) 500

(B) 1,000

(C) 1,500

(D) 2,000

(E) Each of the percent increases is the

same.

请问这道题如何快速解答，不会是一个一个算吧