-37.74% is the change from 159 to 99
Calculation steps:
[( 99 - 159 ) ÷ 159] x 100 = -37.74%
Formula
Percentage change = [(99 - 159) / 159] x 100
Subtract the new number by the original number
99 - 159 = -60
-60 ÷ 159 = -0.37735849056603776
-0.37735849056603776 x 100 = -37.74%