Riordan had 640 erasers. He gave
58 of it to Flynn and
45 of the remainder to Tiffany. How many erasers had he left?
Fraction of the erasers left after giving to Flynn
= 1 -
58 =
38 Fraction of the remaining erasers left after giving to Tiffany
= 1 -
45 =
15
Fraction of the erasers left after giving to Flynn and Tiffany
= 38 x 15
= 340
Total number of erasers = 40 u
40 u = 640
1 u = 640 ÷ 40 = 16
Number of erasers left
= 3 u
= 3 x 16
= 48
Answer(s): 48