-7.89% is the change from 837 to 771
Calculation steps:
[( 771 - 837 ) ÷ 837] x 100 = -7.89%
Formula
Percentage change = [(771 - 837) / 837] x 100
Subtract the new number by the original number
771 - 837 = -66
-66 ÷ 837 = -0.07885304659498207
-0.07885304659498207 x 100 = -7.89%