-13.85% is the change from 975 to 840
Calculation steps:
[( 840 - 975 ) ÷ 975] x 100 = -13.85%
Formula
Percentage change = [(840 - 975) / 975] x 100
Subtract the new number by the original number
840 - 975 = -135
-135 ÷ 975 = -0.13846153846153847
-0.13846153846153847 x 100 = -13.85%