Keisha wants to read for 90 minutes.so far , she has read 30% of her goal. how much longer does she need to reach her goal?

30% of 90            whenever it says "of" put in a multiplication sign 
30% x 90              take out the % sign (percent means divided by 100)
30/100 =3/10               simplify,then multiply by 90
3/10 x 90 = 270/10          simplify
270 = 27     
90 - 27 = 63            subtract 27 because it is the amount read so far from the total
Keisha has to read 63 more minutes to reach her goal.

The answer to your question is ABC = QPR