-12.1% is the change from 934 to 821
Calculation steps:
[( 821 - 934 ) ÷ 934] x 100 = -12.1%
Formula
Percentage change = [(821 - 934) / 934] x 100
Subtract the new number by the original number
821 - 934 = -113
-113 ÷ 934 = -0.12098501070663811
-0.12098501070663811 x 100 = -12.1%