-91.98% is the change from 499 to 40
Calculation steps:
[( 40 - 499 ) ÷ 499] x 100 = -91.98%
Formula
Percentage change = [(40 - 499) / 499] x 100
Subtract the new number by the original number
40 - 499 = -459
-459 ÷ 499 = -0.9198396793587175
-0.9198396793587175 x 100 = -91.98%