263.64% is the change from 66 to 240
Calculation steps:
[( 240 - 66 ) ÷ 66] x 100 = 263.64%
Formula
Percentage change = [(240 - 66) / 66] x 100
Subtract the new number by the original number
240 - 66 = 174
174 ÷ 66 = 2.6363636363636362
2.6363636363636362 x 100 = 263.64%