Answer:
The population decrease by 17%.
Step-by-step explanation:
This is because 66,400 is 83% of 80,000.
100%-83%= 17%
Therefore, the percentage of the population that decreased was 17%
I) 80% x 5640 = Rs. 4512
ii) 4512 divide by 50 = Rs. 90.24
14.29 * .0725 = 1.04
1.04 * 3 = 3.12