171.7% is the change from 311 to 845
Calculation steps:
[( 845 - 311 ) ÷ 311] x 100 = 171.7%
Formula
Percentage change = [(845 - 311) / 311] x 100
Subtract the new number by the original number
845 - 311 = 534
534 ÷ 311 = 1.7170418006430868
1.7170418006430868 x 100 = 171.7%