21.24% is the change from 306 to 371
Calculation steps:
[( 371 - 306 ) ÷ 306] x 100 = 21.24%
Formula
Percentage change = [(371 - 306) / 306] x 100
Subtract the new number by the original number
371 - 306 = 65
65 ÷ 306 = 0.21241830065359477
0.21241830065359477 x 100 = 21.24%