6.43% is the change from 840 to 894
Calculation steps:
[( 894 - 840 ) ÷ 840] x 100 = 6.43%
Formula
Percentage change = [(894 - 840) / 840] x 100
Subtract the new number by the original number
894 - 840 = 54
54 ÷ 840 = 0.06428571428571428
0.06428571428571428 x 100 = 6.43%