100.66% is the change from 305 to 612
Calculation steps:
[( 612 - 305 ) ÷ 305] x 100 = 100.66%
Formula
Percentage change = [(612 - 305) / 305] x 100
Subtract the new number by the original number
612 - 305 = 307
307 ÷ 305 = 1.0065573770491802
1.0065573770491802 x 100 = 100.66%