-7.92% is the change from 821 to 756
Calculation steps:
[( 756 - 821 ) ÷ 821] x 100 = -7.92%
Formula
Percentage change = [(756 - 821) / 821] x 100
Subtract the new number by the original number
756 - 821 = -65
-65 ÷ 821 = -0.07917174177831912
-0.07917174177831912 x 100 = -7.92%