-3.92% is the change from 102 to 98
Calculation steps:
[( 98 - 102 ) ÷ 102] x 100 = -3.92%
Formula
Percentage change = [(98 - 102) / 102] x 100
Subtract the new number by the original number
98 - 102 = -4
-4 ÷ 102 = -0.0392156862745098
-0.0392156862745098 x 100 = -3.92%