-98.1% is the change from 210 to 4
Calculation steps:
[( 4 - 210 ) ÷ 210] x 100 = -98.1%
Formula
Percentage change = [(4 - 210) / 210] x 100
Subtract the new number by the original number
4 - 210 = -206
-206 ÷ 210 = -0.9809523809523809
-0.9809523809523809 x 100 = -98.1%