-33.77% is the change from 231 to 153
Calculation steps:
[( 153 - 231 ) ÷ 231] x 100 = -33.77%
Formula
Percentage change = [(153 - 231) / 231] x 100
Subtract the new number by the original number
153 - 231 = -78
-78 ÷ 231 = -0.33766233766233766
-0.33766233766233766 x 100 = -33.77%