-82.41% is the change from 290 to 51
Calculation steps:
[( 51 - 290 ) ÷ 290] x 100 = -82.41%
Formula
Percentage change = [(51 - 290) / 290] x 100
Subtract the new number by the original number
51 - 290 = -239
-239 ÷ 290 = -0.8241379310344827
-0.8241379310344827 x 100 = -82.41%