31.98% is the change from 491 to 648
Calculation steps:
[( 648 - 491 ) ÷ 491] x 100 = 31.98%
Formula
Percentage change = [(648 - 491) / 491] x 100
Subtract the new number by the original number
648 - 491 = 157
157 ÷ 491 = 0.319755600814664
0.319755600814664 x 100 = 31.98%