19.92% is the change from 768 to 921
Calculation steps:
[( 921 - 768 ) ÷ 768] x 100 = 19.92%
Formula
Percentage change = [(921 - 768) / 768] x 100
Subtract the new number by the original number
921 - 768 = 153
153 ÷ 768 = 0.19921875
0.19921875 x 100 = 19.92%