121.24% is the change from 306 to 677
Calculation steps:
[( 677 - 306 ) ÷ 306] x 100 = 121.24%
Formula
Percentage change = [(677 - 306) / 306] x 100
Subtract the new number by the original number
677 - 306 = 371
371 ÷ 306 = 1.2124183006535947
1.2124183006535947 x 100 = 121.24%