-79.92% is the change from 254 to 51
Calculation steps:
[( 51 - 254 ) ÷ 254] x 100 = -79.92%
Formula
Percentage change = [(51 - 254) / 254] x 100
Subtract the new number by the original number
51 - 254 = -203
-203 ÷ 254 = -0.7992125984251969
-0.7992125984251969 x 100 = -79.92%