-57.14% is the change from 490 to 210
Calculation steps:
[( 210 - 490 ) ÷ 490] x 100 = -57.14%
Formula
Percentage change = [(210 - 490) / 490] x 100
Subtract the new number by the original number
210 - 490 = -280
-280 ÷ 490 = -0.5714285714285714
-0.5714285714285714 x 100 = -57.14%