209.15% is the change from 306 to 946
Calculation steps:
[( 946 - 306 ) ÷ 306] x 100 = 209.15%
Formula
Percentage change = [(946 - 306) / 306] x 100
Subtract the new number by the original number
946 - 306 = 640
640 ÷ 306 = 2.0915032679738563
2.0915032679738563 x 100 = 209.15%