51.39% is the change from 646 to 978
Calculation steps:
[( 978 - 646 ) ÷ 646] x 100 = 51.39%
Formula
Percentage change = [(978 - 646) / 646] x 100
Subtract the new number by the original number
978 - 646 = 332
332 ÷ 646 = 0.5139318885448917
0.5139318885448917 x 100 = 51.39%