-42.47% is the change from 730 to 420
Calculation steps:
[( 420 - 730 ) ÷ 730] x 100 = -42.47%
Formula
Percentage change = [(420 - 730) / 730] x 100
Subtract the new number by the original number
420 - 730 = -310
-310 ÷ 730 = -0.4246575342465753
-0.4246575342465753 x 100 = -42.47%