-66.05% is the change from 813 to 276
Calculation steps:
[( 276 - 813 ) ÷ 813] x 100 = -66.05%
Formula
Percentage change = [(276 - 813) / 813] x 100
Subtract the new number by the original number
276 - 813 = -537
-537 ÷ 813 = -0.6605166051660517
-0.6605166051660517 x 100 = -66.05%