-85.91% is the change from 149 to 21
Calculation steps:
[( 21 - 149 ) ÷ 149] x 100 = -85.91%
Formula
Percentage change = [(21 - 149) / 149] x 100
Subtract the new number by the original number
21 - 149 = -128
-128 ÷ 149 = -0.8590604026845637
-0.8590604026845637 x 100 = -85.91%