Luke had 161 oranges and 50 mangoes at first. He used
37 of the oranges and
45 of the mangoes. He then bought some more mangoes. In the end,
18 of the fruits he had left were oranges. How many mangoes did he buy?
| |
Oranges |
Mangoes |
Total |
| Before |
161 |
50 |
|
| Change 1 |
- 69 |
- 40 |
|
| After 1 |
92 |
10 |
|
| Change 2 |
|
+ some |
|
| After 2 |
1 u |
7 u |
8 u |
Number of oranges that Luke used
=
37 x 161
= 69
Number of oranges that Luke had left
= 161 - 69
= 92
Number of mangoes that Luke used
=
45 x 50
= 40
Number of mangoes that Luke had left
= 50 - 40
= 10
Fraction of the fruits left that were mangoes
= 1 -
18=
78 Number of oranges left = 1 u = 92
Number of mangoes left in the end
= 7 u
= 7 x 92
= 644
Number of mangoes that Luke bought
= 644 - 10
= 634
Answer(s): 634
