-69.75% is the change from 486 to 147
Calculation steps:
[( 147 - 486 ) ÷ 486] x 100 = -69.75%
Formula
Percentage change = [(147 - 486) / 486] x 100
Subtract the new number by the original number
147 - 486 = -339
-339 ÷ 486 = -0.6975308641975309
-0.6975308641975309 x 100 = -69.75%