-43.4% is the change from 159 to 90
Calculation steps:
[( 90 - 159 ) ÷ 159] x 100 = -43.4%
Formula
Percentage change = [(90 - 159) / 159] x 100
Subtract the new number by the original number
90 - 159 = -69
-69 ÷ 159 = -0.4339622641509434
-0.4339622641509434 x 100 = -43.4%