51.87% is the change from 642 to 975
Calculation steps:
[( 975 - 642 ) ÷ 642] x 100 = 51.87%
Formula
Percentage change = [(975 - 642) / 642] x 100
Subtract the new number by the original number
975 - 642 = 333
333 ÷ 642 = 0.5186915887850467
0.5186915887850467 x 100 = 51.87%