-85.51% is the change from 490 to 71
Calculation steps:
[( 71 - 490 ) ÷ 490] x 100 = -85.51%
Formula
Percentage change = [(71 - 490) / 490] x 100
Subtract the new number by the original number
71 - 490 = -419
-419 ÷ 490 = -0.8551020408163266
-0.8551020408163266 x 100 = -85.51%