-71.01% is the change from 507 to 147
Calculation steps:
[( 147 - 507 ) ÷ 507] x 100 = -71.01%
Formula
Percentage change = [(147 - 507) / 507] x 100
Subtract the new number by the original number
147 - 507 = -360
-360 ÷ 507 = -0.7100591715976331
-0.7100591715976331 x 100 = -71.01%