270.8% is the change from 137 to 508
Calculation steps:
[( 508 - 137 ) ÷ 137] x 100 = 270.8%
Formula
Percentage change = [(508 - 137) / 137] x 100
Subtract the new number by the original number
508 - 137 = 371
371 ÷ 137 = 2.708029197080292
2.708029197080292 x 100 = 270.8%