-18.57% is the change from 813 to 662
Calculation steps:
[( 662 - 813 ) ÷ 813] x 100 = -18.57%
Formula
Percentage change = [(662 - 813) / 813] x 100
Subtract the new number by the original number
662 - 813 = -151
-151 ÷ 813 = -0.1857318573185732
-0.1857318573185732 x 100 = -18.57%