-61.53% is the change from 811 to 312
Calculation steps:
[( 312 - 811 ) ÷ 811] x 100 = -61.53%
Formula
Percentage change = [(312 - 811) / 811] x 100
Subtract the new number by the original number
312 - 811 = -499
-499 ÷ 811 = -0.6152897657213316
-0.6152897657213316 x 100 = -61.53%