-78.9% is the change from 507 to 107
Calculation steps:
[( 107 - 507 ) ÷ 507] x 100 = -78.9%
Formula
Percentage change = [(107 - 507) / 507] x 100
Subtract the new number by the original number
107 - 507 = -400
-400 ÷ 507 = -0.7889546351084813
-0.7889546351084813 x 100 = -78.9%