63.16% is the change from 266 to 434
Calculation steps:
[( 434 - 266 ) ÷ 266] x 100 = 63.16%
Formula
Percentage change = [(434 - 266) / 266] x 100
Subtract the new number by the original number
434 - 266 = 168
168 ÷ 266 = 0.631578947368421
0.631578947368421 x 100 = 63.16%