984.62% is the change from 39 to 423
Calculation steps:
[( 423 - 39 ) ÷ 39] x 100 = 984.62%
Formula
Percentage change = [(423 - 39) / 39] x 100
Subtract the new number by the original number
423 - 39 = 384
384 ÷ 39 = 9.846153846153847
9.846153846153847 x 100 = 984.62%