-34.5% is the change from 200 to 131
Calculation steps:
[( 131 - 200 ) ÷ 200] x 100 = -34.5%
Formula
Percentage change = [(131 - 200) / 200] x 100
Subtract the new number by the original number
131 - 200 = -69
-69 ÷ 200 = -0.345
-0.345 x 100 = -34.5%