7.47% is the change from 857 to 921
Calculation steps:
[( 921 - 857 ) ÷ 857] x 100 = 7.47%
Formula
Percentage change = [(921 - 857) / 857] x 100
Subtract the new number by the original number
921 - 857 = 64
64 ÷ 857 = 0.07467911318553092
0.07467911318553092 x 100 = 7.47%