-50% is the change from 298 to 149
Calculation steps:
[( 149 - 298 ) ÷ 298] x 100 = -50%
Formula
Percentage change = [(149 - 298) / 298] x 100
Subtract the new number by the original number
149 - 298 = -149
-149 ÷ 298 = -0.5
-0.5 x 100 = -50%
Example