Justin had 192 apples and 128 persimmons at first. He used
58 of the apples and
38 of the persimmons. He then bought some more persimmons. In the end,
18 of the fruits he had left were apples. How many persimmons did he buy?
| |
Apples |
Persimmons |
Total |
| Before |
192 |
128 |
|
| Change 1 |
- 120 |
- 48 |
|
| After 1 |
72 |
80 |
|
| Change 2 |
|
+ some |
|
| After 2 |
1 u |
7 u |
8 u |
Number of apples that Justin used
=
58 x 192
= 120
Number of apples that Justin had left
= 192 - 120
= 72
Number of persimmons that Justin used
=
38 x 128
= 48
Number of persimmons that Justin had left
= 128 - 48
= 80
Fraction of the fruits left that were persimmons
= 1 -
18=
78 Number of apples left = 1 u = 72
Number of persimmons left in the end
= 7 u
= 7 x 72
= 504
Number of persimmons that Justin bought
= 504 - 80
= 424
Answer(s): 424
