-61.16% is the change from 811 to 315
Calculation steps:
[( 315 - 811 ) ÷ 811] x 100 = -61.16%
Formula
Percentage change = [(315 - 811) / 811] x 100
Subtract the new number by the original number
315 - 811 = -496
-496 ÷ 811 = -0.6115906288532675
-0.6115906288532675 x 100 = -61.16%