209.48% is the change from 306 to 947
Calculation steps:
[( 947 - 306 ) ÷ 306] x 100 = 209.48%
Formula
Percentage change = [(947 - 306) / 306] x 100
Subtract the new number by the original number
947 - 306 = 641
641 ÷ 306 = 2.0947712418300655
2.0947712418300655 x 100 = 209.48%