-93.38% is the change from 634 to 42
Calculation steps:
[( 42 - 634 ) ÷ 634] x 100 = -93.38%
Formula
Percentage change = [(42 - 634) / 634] x 100
Subtract the new number by the original number
42 - 634 = -592
-592 ÷ 634 = -0.9337539432176656
-0.9337539432176656 x 100 = -93.38%