60/40 = 1.5 So Renee will need to drive 40miles 1.5 times in order to
cover 60 miles.
Since her speed is exactly 40 mph, she'll need to keep it up for <em>1.5 hours</em>.
To find this, simply subtract 57 from 90. 90 is the measurement for a completed compliment equation, and 57 is the part of the compliment we know.
33 is the answer
-/7? imagine that there is an -1 as the numerator. so now -/7 turns into -1/7
