-80.61% is the change from 263 to 51
Calculation steps:
[( 51 - 263 ) ÷ 263] x 100 = -80.61%
Formula
Percentage change = [(51 - 263) / 263] x 100
Subtract the new number by the original number
51 - 263 = -212
-212 ÷ 263 = -0.8060836501901141
-0.8060836501901141 x 100 = -80.61%