-98.57% is the change from 210 to 3
Calculation steps:
[( 3 - 210 ) ÷ 210] x 100 = -98.57%
Formula
Percentage change = [(3 - 210) / 210] x 100
Subtract the new number by the original number
3 - 210 = -207
-207 ÷ 210 = -0.9857142857142858
-0.9857142857142858 x 100 = -98.57%