83.46% is the change from 266 to 488
Calculation steps:
[( 488 - 266 ) ÷ 266] x 100 = 83.46%
Formula
Percentage change = [(488 - 266) / 266] x 100
Subtract the new number by the original number
488 - 266 = 222
222 ÷ 266 = 0.8345864661654135
0.8345864661654135 x 100 = 83.46%