Riordan had 320 buttons. He gave
58 of it to Tom and
45 of the remainder to Nicole. How many buttons had he left?
Fraction of the buttons left after giving to Tom
= 1 -
58 =
38 Fraction of the remaining buttons left after giving to Nicole
= 1 -
45 =
15
Fraction of the buttons left after giving to Tom and Nicole
= 38 x 15
= 340
Total number of buttons = 40 u
40 u = 320
1 u = 320 ÷ 40 = 8
Number of buttons left
= 3 u
= 3 x 8
= 24
Answer(s): 24