The number of mangosteens David bought in July was 40% more than in June. In August, he bought 70% less mangosteens than in July. If there were 261 more mangosteens in June than August, how many mangosteens did David buy in June?
| June |
July |
August |
| 5x10 |
7x10 |
|
| |
10x7 |
3x7 |
| 50 u |
70 u |
21 u |
100% + 40 = 140%
140% =
140100 =
75July : June = 7 : 5
100% - 70% = 30%
30% =
30100 =
310 August : July = 3 : 10
The number of mangosteens in July is repeated. Make the number of mangosteens in July is the same. LCM of 7 and 10 is 70.
Number of more mangosteens in June than August
= 50 u - 21 u
= 29 u
29 u = 261
1 u = 261 ÷ 29 = 9
Number of mangosteens that David bought in June
= 50 u
= 50 x 9
= 450
Answer(s): 450
