47.71% is the change from 612 to 904
Calculation steps:
[( 904 - 612 ) ÷ 612] x 100 = 47.71%
Formula
Percentage change = [(904 - 612) / 612] x 100
Subtract the new number by the original number
904 - 612 = 292
292 ÷ 612 = 0.477124183006536
0.477124183006536 x 100 = 47.71%