69.65% is the change from 257 to 436
Calculation steps:
[( 436 - 257 ) ÷ 257] x 100 = 69.65%
Formula
Percentage change = [(436 - 257) / 257] x 100
Subtract the new number by the original number
436 - 257 = 179
179 ÷ 257 = 0.6964980544747081
0.6964980544747081 x 100 = 69.65%