-7.11% is the change from 830 to 771
Calculation steps:
[( 771 - 830 ) ÷ 830] x 100 = -7.11%
Formula
Percentage change = [(771 - 830) / 830] x 100
Subtract the new number by the original number
771 - 830 = -59
-59 ÷ 830 = -0.07108433734939759
-0.07108433734939759 x 100 = -7.11%