51.64% is the change from 641 to 972
Calculation steps:
[( 972 - 641 ) ÷ 641] x 100 = 51.64%
Formula
Percentage change = [(972 - 641) / 641] x 100
Subtract the new number by the original number
972 - 641 = 331
331 ÷ 641 = 0.516380655226209
0.516380655226209 x 100 = 51.64%