170.59% is the change from 306 to 828
Calculation steps:
[( 828 - 306 ) ÷ 306] x 100 = 170.59%
Formula
Percentage change = [(828 - 306) / 306] x 100
Subtract the new number by the original number
828 - 306 = 522
522 ÷ 306 = 1.7058823529411764
1.7058823529411764 x 100 = 170.59%