At a market, the ratio of lemons to oranges was 9 : 10. After Jade bought two-fifths of the oranges, there was a total of 150 lemons and oranges left at the market. How many fruits were there at first?
| |
Lemons |
Oranges |
Total |
Comparing lemons
and oranges at first |
9x1 =
9 u |
10x1 =
10 u |
19 u |
Before |
|
5x2 =
10 u |
|
Change |
|
- 2x2 =
- 4 u |
|
After |
9 u |
3x2 =
6 u |
150 |
The number of oranges at first is repeated. Make the number of oranges at first the same. LCM of 10 and 5 is 10.
Total number of fruits left
= 9 u + 6 u
= 15 u
15 u = 150
1 u = 150 ÷ 15 = 10
Number of fruits at first
= 9 u + 10 u
= 19 u
= 19 x 10
= 190
Answer(s): 190
