50% is the change from 648 to 972
Calculation steps:
[( 972 - 648 ) ÷ 648] x 100 = 50%
Formula
Percentage change = [(972 - 648) / 648] x 100
Subtract the new number by the original number
972 - 648 = 324
324 ÷ 648 = 0.5
0.5 x 100 = 50%
Example