214.29% is the change from 266 to 836
Calculation steps:
[( 836 - 266 ) ÷ 266] x 100 = 214.29%
Formula
Percentage change = [(836 - 266) / 266] x 100
Subtract the new number by the original number
836 - 266 = 570
570 ÷ 266 = 2.142857142857143
2.142857142857143 x 100 = 214.29%