-7.47% is the change from 897 to 830
Calculation steps:
[( 830 - 897 ) ÷ 897] x 100 = -7.47%
Formula
Percentage change = [(830 - 897) / 897] x 100
Subtract the new number by the original number
830 - 897 = -67
-67 ÷ 897 = -0.07469342251950947
-0.07469342251950947 x 100 = -7.47%