6.79% is the change from 840 to 897
Calculation steps:
[( 897 - 840 ) ÷ 840] x 100 = 6.79%
Formula
Percentage change = [(897 - 840) / 840] x 100
Subtract the new number by the original number
897 - 840 = 57
57 ÷ 840 = 0.06785714285714285
0.06785714285714285 x 100 = 6.79%