257.58% is the change from 66 to 236
Calculation steps:
[( 236 - 66 ) ÷ 66] x 100 = 257.58%
Formula
Percentage change = [(236 - 66) / 66] x 100
Subtract the new number by the original number
236 - 66 = 170
170 ÷ 66 = 2.5757575757575757
2.5757575757575757 x 100 = 257.58%