-81.18% is the change from 271 to 51
Calculation steps:
[( 51 - 271 ) ÷ 271] x 100 = -81.18%
Formula
Percentage change = [(51 - 271) / 271] x 100
Subtract the new number by the original number
51 - 271 = -220
-220 ÷ 271 = -0.8118081180811808
-0.8118081180811808 x 100 = -81.18%