At a fruit stall, there were 570 oranges and starfruits at first.
14 of the oranges and
16 of the starfruits were sold. In the end, there were same number of oranges and starfruits. How many less starfruits than oranges were sold?
| |
Oranges |
Starfruits |
| Before |
4x5 =
20 u |
6x3 =
18 u |
| Change |
- 1x5 =
- 5 u
|
- 1x3 =
- 3 u
|
| After |
3x5 =
15 u |
5x3 =
15 u |
Comparing oranges
and starfruits in the end |
1x15 =
15 u |
1x15 =
15 u |
The number of oranges and starfruits in the end is the same. Make the number of oranges and starfruits in the end the same. LCM of 3, 5 and 1 is 15.
Number of oranges and starfruits in the end
= 20 u + 18 u
= 38 u
38 u = 570
1 u = 570 ÷ 38 = 15
Number of less starfruits than oranges were sold
= 5 u - 3 u
= 2 u
= 2 x 15
= 30
Answer(s): 30
