Question

A door frame is 7 feet high. In order to accommodate a larger door, the frame
must be trimmed to increase its height by 3%. How high is the door frame
after it has been trimmed? Do not include units in your answer.
Answer here

Answer 1

first you need to get 3% of 7 so
7x0.03= 0.21
then you need to add that 3% onto 7
7+0.21=7.21
therefore the door frame is now 7.21 feet high