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Last Updated on May 3, 2023
GMAT OFFICIAL GUIDE PS
Solution:
We are given that 0.01 ounces of water evaporated EACH DAY. Furthermore, we know that this process happened over a 20-DAY PERIOD. To calculate the total amount of water that evaporated during this time frame we need to multiply 0.01 by 20. This gives us:
0.01 x 20 = 0.2 ounces
Finally, we are asked for “What percent” of the original amount of water evaporated during this period. To determine this percentage, we have to make sure we translate the expression correctly. We can translate it to:
(Amount Evaporated/Original Amount) x 100%
(0.2/10) x 100%
(2/100) x 100% = 2%
Answer: D
