-62.86% is the change from 210 to 78
Calculation steps:
[( 78 - 210 ) ÷ 210] x 100 = -62.86%
Formula
Percentage change = [(78 - 210) / 210] x 100
Subtract the new number by the original number
78 - 210 = -132
-132 ÷ 210 = -0.6285714285714286
-0.6285714285714286 x 100 = -62.86%