-9.97% is the change from 933 to 840
Calculation steps:
[( 840 - 933 ) ÷ 933] x 100 = -9.97%
Formula
Percentage change = [(840 - 933) / 933] x 100
Subtract the new number by the original number
840 - 933 = -93
-93 ÷ 933 = -0.09967845659163987
-0.09967845659163987 x 100 = -9.97%