52.4% is the change from 645 to 983
Calculation steps:
[( 983 - 645 ) ÷ 645] x 100 = 52.4%
Formula
Percentage change = [(983 - 645) / 645] x 100
Subtract the new number by the original number
983 - 645 = 338
338 ÷ 645 = 0.524031007751938
0.524031007751938 x 100 = 52.4%