-81.25% is the change from 272 to 51
Calculation steps:
[( 51 - 272 ) ÷ 272] x 100 = -81.25%
Formula
Percentage change = [(51 - 272) / 272] x 100
Subtract the new number by the original number
51 - 272 = -221
-221 ÷ 272 = -0.8125
-0.8125 x 100 = -81.25%