-47.4% is the change from 154 to 81
Calculation steps:
[( 81 - 154 ) ÷ 154] x 100 = -47.4%
Formula
Percentage change = [(81 - 154) / 154] x 100
Subtract the new number by the original number
81 - 154 = -73
-73 ÷ 154 = -0.474025974025974
-0.474025974025974 x 100 = -47.4%