-76.93% is the change from 646 to 149
Calculation steps:
[( 149 - 646 ) ÷ 646] x 100 = -76.93%
Formula
Percentage change = [(149 - 646) / 646] x 100
Subtract the new number by the original number
149 - 646 = -497
-497 ÷ 646 = -0.7693498452012384
-0.7693498452012384 x 100 = -76.93%