Ahmad had 112 apples and 160 starfruits at first. He used
37 of the apples and
45 of the starfruits. He then bought some more starfruits. In the end,
110 of the fruits he had left were apples. How many starfruits did he buy?
| |
Apples |
Starfruits |
Total |
| Before |
112 |
160 |
|
| Change 1 |
- 48 |
- 128 |
|
| After 1 |
64 |
32 |
|
| Change 2 |
|
+ some |
|
| After 2 |
1 u |
9 u |
10 u |
Number of apples that Ahmad used
=
37 x 112
= 48
Number of apples that Ahmad had left
= 112 - 48
= 64
Number of starfruits that Ahmad used
=
45 x 160
= 128
Number of starfruits that Ahmad had left
= 160 - 128
= 32
Fraction of the fruits left that were starfruits
= 1 -
110=
910 Number of apples left = 1 u = 64
Number of starfruits left in the end
= 9 u
= 9 x 64
= 576
Number of starfruits that Ahmad bought
= 576 - 32
= 544
Answer(s): 544
