-82.47% is the change from 291 to 51
Calculation steps:
[( 51 - 291 ) ÷ 291] x 100 = -82.47%
Formula
Percentage change = [(51 - 291) / 291] x 100
Subtract the new number by the original number
51 - 291 = -240
-240 ÷ 291 = -0.8247422680412371
-0.8247422680412371 x 100 = -82.47%