-83.93% is the change from 305 to 49
Calculation steps:
[( 49 - 305 ) ÷ 305] x 100 = -83.93%
Formula
Percentage change = [(49 - 305) / 305] x 100
Subtract the new number by the original number
49 - 305 = -256
-256 ÷ 305 = -0.839344262295082
-0.839344262295082 x 100 = -83.93%