-98.5% is the change from 200 to 3
Calculation steps:
[( 3 - 200 ) ÷ 200] x 100 = -98.5%
Formula
Percentage change = [(3 - 200) / 200] x 100
Subtract the new number by the original number
3 - 200 = -197
-197 ÷ 200 = -0.985
-0.985 x 100 = -98.5%
Example