51.63% is the change from 645 to 978
Calculation steps:
[( 978 - 645 ) ÷ 645] x 100 = 51.63%
Formula
Percentage change = [(978 - 645) / 645] x 100
Subtract the new number by the original number
978 - 645 = 333
333 ÷ 645 = 0.5162790697674419
0.5162790697674419 x 100 = 51.63%