-84.37% is the change from 499 to 78
Calculation steps:
[( 78 - 499 ) ÷ 499] x 100 = -84.37%
Formula
Percentage change = [(78 - 499) / 499] x 100
Subtract the new number by the original number
78 - 499 = -421
-421 ÷ 499 = -0.843687374749499
-0.843687374749499 x 100 = -84.37%