18.38% is the change from 778 to 921
Calculation steps:
[( 921 - 778 ) ÷ 778] x 100 = 18.38%
Formula
Percentage change = [(921 - 778) / 778] x 100
Subtract the new number by the original number
921 - 778 = 143
143 ÷ 778 = 0.18380462724935734
0.18380462724935734 x 100 = 18.38%