Fractions

Algebra Level 3

Milly and Ally had 156 stamps.

Milly gave away of her 5 7 \dfrac57 stamps and Ally gave away 4 5 \dfrac45 of her stamps.

They were left with a total of 36 stamps.

How many more stamps did Milly give than Ally?


The answer is 40.

Danielle Ang by Danielle Ang , 18, Singapore

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1 solution

Danielle Ang
May 9, 2016

u u =unit p p =part

Milly Ally total
7 u u 5 p p 156
2 u u 1 p p 36
10 u u 5 p p 36 × 5 36\times 5 =180
3 u u 0 p p 180-156=24
1 u u 0 p p 24 3 \frac{24}{3} =8
2 u u 0 p p 8 × 2 8\times 2 =16
0 u u 1 p p 36-16=20
5 u u 0 p p 8 × 5 8\times 5 =40
0 u u 4 p p 20 × 4 20\times 4 =80

80-40= 40 \boxed{40}

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I think Ally gave away more than Milly, though.

Julie Wright - 3 years, 3 months ago

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