Question 215 Problem Solving 2018 GMAT Official Guide Video explanation: Last Sunday a certain store sold copies of Newspaper A for…

GMAT Quantum says May 24, 2021 at 8:35 AM That is because in the question the quantity $r$ is defined as a percent, so I have to convert the fraction to the percent by multiplying by 100. Reply

Adhi says

at 2:06

why did you multiply by 100

GMAT Quantum says

That is because in the question the quantity $r$ is defined as a percent, so I have to convert the fraction to the percent by multiplying by 100.