49.02% is the change from 612 to 912
Calculation steps:
[( 912 - 612 ) ÷ 612] x 100 = 49.02%
Formula
Percentage change = [(912 - 612) / 612] x 100
Subtract the new number by the original number
912 - 612 = 300
300 ÷ 612 = 0.49019607843137253
0.49019607843137253 x 100 = 49.02%