-66.21% is the change from 811 to 274
Calculation steps:
[( 274 - 811 ) ÷ 811] x 100 = -66.21%
Formula
Percentage change = [(274 - 811) / 811] x 100
Subtract the new number by the original number
274 - 811 = -537
-537 ÷ 811 = -0.6621454993834772
-0.6621454993834772 x 100 = -66.21%