-50% is the change from 196 to 98
Calculation steps:
[( 98 - 196 ) ÷ 196] x 100 = -50%
Formula
Percentage change = [(98 - 196) / 196] x 100
Subtract the new number by the original number
98 - 196 = -98
-98 ÷ 196 = -0.5
-0.5 x 100 = -50%
Example