-50% is the change from 148 to 74
Calculation steps:
[( 74 - 148 ) ÷ 148] x 100 = -50%
Formula
Percentage change = [(74 - 148) / 148] x 100
Subtract the new number by the original number
74 - 148 = -74
-74 ÷ 148 = -0.5
-0.5 x 100 = -50%
Example