-98% is the change from 100 to 2
Calculation steps:
[( 2 - 100 ) ÷ 100] x 100 = -98%
Formula
Percentage change = [(2 - 100) / 100] x 100
Subtract the new number by the original number
2 - 100 = -98
-98 ÷ 100 = -0.98
-0.98 x 100 = -98%
Example