-51.43% is the change from 210 to 102
Calculation steps:
[( 102 - 210 ) ÷ 210] x 100 = -51.43%
Formula
Percentage change = [(102 - 210) / 210] x 100
Subtract the new number by the original number
102 - 210 = -108
-108 ÷ 210 = -0.5142857142857142
-0.5142857142857142 x 100 = -51.43%