-76.52% is the change from 643 to 151
Calculation steps:
[( 151 - 643 ) ÷ 643] x 100 = -76.52%
Formula
Percentage change = [(151 - 643) / 643] x 100
Subtract the new number by the original number
151 - 643 = -492
-492 ÷ 643 = -0.7651632970451011
-0.7651632970451011 x 100 = -76.52%