219.61% is the change from 306 to 978
Calculation steps:
[( 978 - 306 ) ÷ 306] x 100 = 219.61%
Formula
Percentage change = [(978 - 306) / 306] x 100
Subtract the new number by the original number
978 - 306 = 672
672 ÷ 306 = 2.196078431372549
2.196078431372549 x 100 = 219.61%