Albert had 520 buttons. He gave
58 of it to Zane and
45 of the remainder to Risa. How many buttons had he left?
Fraction of the buttons left after giving to Zane
= 1 -
58 =
38 Fraction of the remaining buttons left after giving to Risa
= 1 -
45 =
15
Fraction of the buttons left after giving to Zane and Risa
= 38 x 15
= 340
Total number of buttons = 40 u
40 u = 520
1 u = 520 ÷ 40 = 13
Number of buttons left
= 3 u
= 3 x 13
= 39
Answer(s): 39