At a stall, the ratio of pears to oranges was 4 : 9. After Betty bought three-fifths of the oranges, there was a total of 228 pears and oranges left at the stall. How many fruits were there at first?
| |
Pears |
Oranges |
Total |
Comparing pears
and oranges at first |
4x5 =
20 u |
9x5 =
45 u |
65 u |
Before |
|
5x9 =
45 u |
|
Change |
|
- 3x9 =
- 27 u |
|
After |
20 u |
2x9 =
18 u |
228 |
The number of oranges at first is repeated. Make the number of oranges at first the same. LCM of 9 and 5 is 45.
Total number of fruits left
= 20 u + 18 u
= 38 u
38 u = 228
1 u = 228 ÷ 38 = 6
Number of fruits at first
= 20 u + 45 u
= 65 u
= 65 x 6
= 390
Answer(s): 390
