163.67% is the change from 311 to 820
Calculation steps:
[( 820 - 311 ) ÷ 311] x 100 = 163.67%
Formula
Percentage change = [(820 - 311) / 311] x 100
Subtract the new number by the original number
820 - 311 = 509
509 ÷ 311 = 1.6366559485530547
1.6366559485530547 x 100 = 163.67%