-7.98% is the change from 902 to 830
Calculation steps:
[( 830 - 902 ) ÷ 902] x 100 = -7.98%
Formula
Percentage change = [(830 - 902) / 902] x 100
Subtract the new number by the original number
830 - 902 = -72
-72 ÷ 902 = -0.07982261640798226
-0.07982261640798226 x 100 = -7.98%