255.07% is the change from 138 to 490
Calculation steps:
[( 490 - 138 ) ÷ 138] x 100 = 255.07%
Formula
Percentage change = [(490 - 138) / 138] x 100
Subtract the new number by the original number
490 - 138 = 352
352 ÷ 138 = 2.550724637681159
2.550724637681159 x 100 = 255.07%