The reduction was 1/5.
Because you are given the reduced values, multiply the reduced value by the inverrse of the factor:
Inverse of 1/5 = 5
Height = 3 x5 = 15
Base = 5 x 5 = 25
The base is 25
3/8=.375
.375 move the decimal two times to the right to make it a percent so it would be 37.5%
The answer is 2,800 or 2800
B I’m pretty sure sorry if wrong