-66.05% is the change from 816 to 277
Calculation steps:
[( 277 - 816 ) ÷ 816] x 100 = -66.05%
Formula
Percentage change = [(277 - 816) / 816] x 100
Subtract the new number by the original number
277 - 816 = -539
-539 ÷ 816 = -0.6605392156862745
-0.6605392156862745 x 100 = -66.05%