-81.59% is the change from 277 to 51
Calculation steps:
[( 51 - 277 ) ÷ 277] x 100 = -81.59%
Formula
Percentage change = [(51 - 277) / 277] x 100
Subtract the new number by the original number
51 - 277 = -226
-226 ÷ 277 = -0.8158844765342961
-0.8158844765342961 x 100 = -81.59%