100.4% is the change from 253 to 507
Calculation steps:
[( 507 - 253 ) ÷ 253] x 100 = 100.4%
Formula
Percentage change = [(507 - 253) / 253] x 100
Subtract the new number by the original number
507 - 253 = 254
254 ÷ 253 = 1.0039525691699605
1.0039525691699605 x 100 = 100.4%