-80.48% is the change from 251 to 49
Calculation steps:
[( 49 - 251 ) ÷ 251] x 100 = -80.48%
Formula
Percentage change = [(49 - 251) / 251] x 100
Subtract the new number by the original number
49 - 251 = -202
-202 ÷ 251 = -0.8047808764940239
-0.8047808764940239 x 100 = -80.48%