20% is the change from 690 to 828
Calculation steps:
[( 828 - 690 ) ÷ 690] x 100 = 20%
Formula
Percentage change = [(828 - 690) / 690] x 100
Subtract the new number by the original number
828 - 690 = 138
138 ÷ 690 = 0.2
0.2 x 100 = 20%
Example