-24.5% is the change from 200 to 151
Calculation steps:
[( 151 - 200 ) ÷ 200] x 100 = -24.5%
Formula
Percentage change = [(151 - 200) / 200] x 100
Subtract the new number by the original number
151 - 200 = -49
-49 ÷ 200 = -0.245
-0.245 x 100 = -24.5%