-7.8% is the change from 898 to 828
Calculation steps:
[( 828 - 898 ) ÷ 898] x 100 = -7.8%
Formula
Percentage change = [(828 - 898) / 898] x 100
Subtract the new number by the original number
828 - 898 = -70
-70 ÷ 898 = -0.0779510022271715
-0.0779510022271715 x 100 = -7.8%