210.86% is the change from 267 to 830
Calculation steps:
[( 830 - 267 ) ÷ 267] x 100 = 210.86%
Formula
Percentage change = [(830 - 267) / 267] x 100
Subtract the new number by the original number
830 - 267 = 563
563 ÷ 267 = 2.108614232209738
2.108614232209738 x 100 = 210.86%