121.21% is the change from 448 to 991
Calculation steps:
[( 991 - 448 ) ÷ 448] x 100 = 121.21%
Formula
Percentage change = [(991 - 448) / 448] x 100
Subtract the new number by the original number
991 - 448 = 543
543 ÷ 448 = 1.2120535714285714
1.2120535714285714 x 100 = 121.21%