-78.7% is the change from 507 to 108
Calculation steps:
[( 108 - 507 ) ÷ 507] x 100 = -78.7%
Formula
Percentage change = [(108 - 507) / 507] x 100
Subtract the new number by the original number
108 - 507 = -399
-399 ÷ 507 = -0.7869822485207101
-0.7869822485207101 x 100 = -78.7%