257.97% is the change from 138 to 494
Calculation steps:
[( 494 - 138 ) ÷ 138] x 100 = 257.97%
Formula
Percentage change = [(494 - 138) / 138] x 100
Subtract the new number by the original number
494 - 138 = 356
356 ÷ 138 = 2.579710144927536
2.579710144927536 x 100 = 257.97%