-61.6% is the change from 237 to 91
Calculation steps:
[( 91 - 237 ) ÷ 237] x 100 = -61.6%
Formula
Percentage change = [(91 - 237) / 237] x 100
Subtract the new number by the original number
91 - 237 = -146
-146 ÷ 237 = -0.6160337552742616
-0.6160337552742616 x 100 = -61.6%