-37.65% is the change from 826 to 515
Calculation steps:
[( 515 - 826 ) ÷ 826] x 100 = -37.65%
Formula
Percentage change = [(515 - 826) / 826] x 100
Subtract the new number by the original number
515 - 826 = -311
-311 ÷ 826 = -0.3765133171912833
-0.3765133171912833 x 100 = -37.65%