-69.43% is the change from 507 to 155
Calculation steps:
[( 155 - 507 ) ÷ 507] x 100 = -69.43%
Formula
Percentage change = [(155 - 507) / 507] x 100
Subtract the new number by the original number
155 - 507 = -352
-352 ÷ 507 = -0.6942800788954635
-0.6942800788954635 x 100 = -69.43%