-3.18% is the change from 942 to 912
Calculation steps:
[( 912 - 942 ) ÷ 942] x 100 = -3.18%
Formula
Percentage change = [(912 - 942) / 942] x 100
Subtract the new number by the original number
912 - 942 = -30
-30 ÷ 942 = -0.03184713375796178
-0.03184713375796178 x 100 = -3.18%