-6.94% is the change from 821 to 764
Calculation steps:
[( 764 - 821 ) ÷ 821] x 100 = -6.94%
Formula
Percentage change = [(764 - 821) / 821] x 100
Subtract the new number by the original number
764 - 821 = -57
-57 ÷ 821 = -0.06942752740560293
-0.06942752740560293 x 100 = -6.94%