49.51% is the change from 616 to 921
Calculation steps:
[( 921 - 616 ) ÷ 616] x 100 = 49.51%
Formula
Percentage change = [(921 - 616) / 616] x 100
Subtract the new number by the original number
921 - 616 = 305
305 ÷ 616 = 0.49512987012987014
0.49512987012987014 x 100 = 49.51%