49.84% is the change from 612 to 917
Calculation steps:
[( 917 - 612 ) ÷ 612] x 100 = 49.84%
Formula
Percentage change = [(917 - 612) / 612] x 100
Subtract the new number by the original number
917 - 612 = 305
305 ÷ 612 = 0.49836601307189543
0.49836601307189543 x 100 = 49.84%