-63.57% is the change from 280 to 102
Calculation steps:
[( 102 - 280 ) ÷ 280] x 100 = -63.57%
Formula
Percentage change = [(102 - 280) / 280] x 100
Subtract the new number by the original number
102 - 280 = -178
-178 ÷ 280 = -0.6357142857142857
-0.6357142857142857 x 100 = -63.57%