-52.95% is the change from 491 to 231
Calculation steps:
[( 231 - 491 ) ÷ 491] x 100 = -52.95%
Formula
Percentage change = [(231 - 491) / 491] x 100
Subtract the new number by the original number
231 - 491 = -260
-260 ÷ 491 = -0.5295315682281059
-0.5295315682281059 x 100 = -52.95%