-70.06% is the change from 491 to 147
Calculation steps:
[( 147 - 491 ) ÷ 491] x 100 = -70.06%
Formula
Percentage change = [(147 - 491) / 491] x 100
Subtract the new number by the original number
147 - 491 = -344
-344 ÷ 491 = -0.7006109979633401
-0.7006109979633401 x 100 = -70.06%