-76.63% is the change from 646 to 151
Calculation steps:
[( 151 - 646 ) ÷ 646] x 100 = -76.63%
Formula
Percentage change = [(151 - 646) / 646] x 100
Subtract the new number by the original number
151 - 646 = -495
-495 ÷ 646 = -0.7662538699690402
-0.7662538699690402 x 100 = -76.63%