-51% is the change from 200 to 98
Calculation steps:
[( 98 - 200 ) ÷ 200] x 100 = -51%
Formula
Percentage change = [(98 - 200) / 200] x 100
Subtract the new number by the original number
98 - 200 = -102
-102 ÷ 200 = -0.51
-0.51 x 100 = -51%
Example