-22.49% is the change from 507 to 393
Calculation steps:
[( 393 - 507 ) ÷ 507] x 100 = -22.49%
Formula
Percentage change = [(393 - 507) / 507] x 100
Subtract the new number by the original number
393 - 507 = -114
-114 ÷ 507 = -0.22485207100591717
-0.22485207100591717 x 100 = -22.49%