269.57% is the change from 138 to 510
Calculation steps:
[( 510 - 138 ) ÷ 138] x 100 = 269.57%
Formula
Percentage change = [(510 - 138) / 138] x 100
Subtract the new number by the original number
510 - 138 = 372
372 ÷ 138 = 2.6956521739130435
2.6956521739130435 x 100 = 269.57%