-77.76% is the change from 490 to 109
Calculation steps:
[( 109 - 490 ) ÷ 490] x 100 = -77.76%
Formula
Percentage change = [(109 - 490) / 490] x 100
Subtract the new number by the original number
109 - 490 = -381
-381 ÷ 490 = -0.7775510204081633
-0.7775510204081633 x 100 = -77.76%