-91.97% is the change from 610 to 49
Calculation steps:
[( 49 - 610 ) ÷ 610] x 100 = -91.97%
Formula
Percentage change = [(49 - 610) / 610] x 100
Subtract the new number by the original number
49 - 610 = -561
-561 ÷ 610 = -0.919672131147541
-0.919672131147541 x 100 = -91.97%