-15.38% is the change from 507 to 429
Calculation steps:
[( 429 - 507 ) ÷ 507] x 100 = -15.38%
Formula
Percentage change = [(429 - 507) / 507] x 100
Subtract the new number by the original number
429 - 507 = -78
-78 ÷ 507 = -0.15384615384615385
-0.15384615384615385 x 100 = -15.38%