-37.52% is the change from 829 to 518
Calculation steps:
[( 518 - 829 ) ÷ 829] x 100 = -37.52%
Formula
Percentage change = [(518 - 829) / 829] x 100
Subtract the new number by the original number
518 - 829 = -311
-311 ÷ 829 = -0.3751507840772014
-0.3751507840772014 x 100 = -37.52%