-73.97% is the change from 826 to 215
Calculation steps:
[( 215 - 826 ) ÷ 826] x 100 = -73.97%
Formula
Percentage change = [(215 - 826) / 826] x 100
Subtract the new number by the original number
215 - 826 = -611
-611 ÷ 826 = -0.7397094430992736
-0.7397094430992736 x 100 = -73.97%