-27.99% is the change from 861 to 620
Calculation steps:
[( 620 - 861 ) ÷ 861] x 100 = -27.99%
Formula
Percentage change = [(620 - 861) / 861] x 100
Subtract the new number by the original number
620 - 861 = -241
-241 ÷ 861 = -0.27990708478513354
-0.27990708478513354 x 100 = -27.99%
Example