170.87% is the change from 309 to 837
Calculation steps:
[( 837 - 309 ) ÷ 309] x 100 = 170.87%
Formula
Percentage change = [(837 - 309) / 309] x 100
Subtract the new number by the original number
837 - 309 = 528
528 ÷ 309 = 1.7087378640776698
1.7087378640776698 x 100 = 170.87%