-86.09% is the change from 151 to 21
Calculation steps:
[( 21 - 151 ) ÷ 151] x 100 = -86.09%
Formula
Percentage change = [(21 - 151) / 151] x 100
Subtract the new number by the original number
21 - 151 = -130
-130 ÷ 151 = -0.8609271523178808
-0.8609271523178808 x 100 = -86.09%