-76.78% is the change from 646 to 150
Calculation steps:
[( 150 - 646 ) ÷ 646] x 100 = -76.78%
Formula
Percentage change = [(150 - 646) / 646] x 100
Subtract the new number by the original number
150 - 646 = -496
-496 ÷ 646 = -0.7678018575851393
-0.7678018575851393 x 100 = -76.78%