Glen had 66 oranges and 121 starfruits at first. He used
56 of the oranges and
611 of the starfruits. He then bought some more starfruits. In the end,
18 of the fruits he had left were oranges. How many starfruits did he buy?
| |
Oranges |
Starfruits |
Total |
| Before |
66 |
121 |
|
| Change 1 |
- 55 |
- 66 |
|
| After 1 |
11 |
55 |
|
| Change 2 |
|
+ some |
|
| After 2 |
1 u |
7 u |
8 u |
Number of oranges that Glen used
=
56 x 66
= 55
Number of oranges that Glen had left
= 66 - 55
= 11
Number of starfruits that Glen used
=
611 x 121
= 66
Number of starfruits that Glen had left
= 121 - 66
= 55
Fraction of the fruits left that were starfruits
= 1 -
18=
78 Number of oranges left = 1 u = 11
Number of starfruits left in the end
= 7 u
= 7 x 11
= 77
Number of starfruits that Glen bought
= 77 - 55
= 22
Answer(s): 22
