-17.1% is the change from 930 to 771
Calculation steps:
[( 771 - 930 ) ÷ 930] x 100 = -17.1%
Formula
Percentage change = [(771 - 930) / 930] x 100
Subtract the new number by the original number
771 - 930 = -159
-159 ÷ 930 = -0.17096774193548386
-0.17096774193548386 x 100 = -17.1%