-69.03% is the change from 507 to 157
Calculation steps:
[( 157 - 507 ) ÷ 507] x 100 = -69.03%
Formula
Percentage change = [(157 - 507) / 507] x 100
Subtract the new number by the original number
157 - 507 = -350
-350 ÷ 507 = -0.6903353057199211
-0.6903353057199211 x 100 = -69.03%