-46.36% is the change from 151 to 81
Calculation steps:
[( 81 - 151 ) ÷ 151] x 100 = -46.36%
Formula
Percentage change = [(81 - 151) / 151] x 100
Subtract the new number by the original number
81 - 151 = -70
-70 ÷ 151 = -0.46357615894039733
-0.46357615894039733 x 100 = -46.36%