50.93% is the change from 644 to 972
Calculation steps:
[( 972 - 644 ) ÷ 644] x 100 = 50.93%
Formula
Percentage change = [(972 - 644) / 644] x 100
Subtract the new number by the original number
972 - 644 = 328
328 ÷ 644 = 0.5093167701863354
0.5093167701863354 x 100 = 50.93%