-8.53% is the change from 821 to 751
Calculation steps:
[( 751 - 821 ) ÷ 821] x 100 = -8.53%
Formula
Percentage change = [(751 - 821) / 821] x 100
Subtract the new number by the original number
751 - 821 = -70
-70 ÷ 821 = -0.08526187576126674
-0.08526187576126674 x 100 = -8.53%