103.61% is the change from 305 to 621
Calculation steps:
[( 621 - 305 ) ÷ 305] x 100 = 103.61%
Formula
Percentage change = [(621 - 305) / 305] x 100
Subtract the new number by the original number
621 - 305 = 316
316 ÷ 305 = 1.0360655737704918
1.0360655737704918 x 100 = 103.61%