-83.27% is the change from 251 to 42
Calculation steps:
[( 42 - 251 ) ÷ 251] x 100 = -83.27%
Formula
Percentage change = [(42 - 251) / 251] x 100
Subtract the new number by the original number
42 - 251 = -209
-209 ÷ 251 = -0.8326693227091634
-0.8326693227091634 x 100 = -83.27%