-6.57% is the change from 822 to 768
Calculation steps:
[( 768 - 822 ) ÷ 822] x 100 = -6.57%
Formula
Percentage change = [(768 - 822) / 822] x 100
Subtract the new number by the original number
768 - 822 = -54
-54 ÷ 822 = -0.06569343065693431
-0.06569343065693431 x 100 = -6.57%