At the farm, the cow population increased by 30% in the second month and then by a further 20% in the next 3 months. If there were 1092 cows in the end, how many cows were there at the farm at first?
| |
Cows |
| Before |
100% |
| Change 1 |
+ 30% |
| After 1 |
130% |
| Change 2 |
+ 26% |
| After 2 |
156% |
Population of cows at first = 100%
New population of cows after first increase
= 100% + 30%
= 130%
Percentage of second increase
= 20% x 130%
=
20100 x 130%
= 26%
New population of cows after second increase
= 130% + 26%
= 156%
156% of cow population = 1092
1% of the cow population
= 1092 ÷ 156
= 7
100% of cow population
= 100 x 7
= 700
Number of cows at first = 700
Answer(s): 700
