The number of dragon fruits Mark bought in August was 10% more than in July. In September, he bought 70% less dragon fruits than in August. If there were 603 more dragon fruits in July than September, how many dragon fruits did Mark buy in July?
| July |
August |
September |
| 10x10 |
11x10 |
|
| |
10x11 |
3x11 |
| 100 u |
110 u |
33 u |
100% + 10 = 110%
110% =
110100 =
1110August : July = 11 : 10
100% - 70% = 30%
30% =
30100 =
310 September : August = 3 : 10
The number of dragon fruits in August is repeated. Make the number of dragon fruits in August is the same. LCM of 11 and 10 is 110.
Number of more dragon fruits in July than September
= 100 u - 33 u
= 67 u
67 u = 603
1 u = 603 ÷ 67 = 9
Number of dragon fruits that Mark bought in July
= 100 u
= 100 x 9
= 900
Answer(s): 900
