The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: find the cost of fencing around a circular field of diameter 16 m at the rate of rs . 3 a meter ?
[EX A]: 150.84

[EX Q]: Problem: albert invested rs . 8000 in a scheme for 2 years at compound interest rate 5 % p . a . how much amount will albert get on maturity of the fixed deposit ?
[EX A]: 882

[EX Q]: Problem: a part - time employee ' s hourly wage was increased by 25 % . she decided to decrease the number of hours worked per week so that her total income did not change . by approximately what percent should the number of hours worked be decreased ?
[EX A]:
20 %