2102.22% is the change from 45 to 991
Calculation steps:
[( 991 - 45 ) ÷ 45] x 100 = 2102.22%
Formula
Percentage change = [(991 - 45) / 45] x 100
Subtract the new number by the original number
991 - 45 = 946
946 ÷ 45 = 21.022222222222222
21.022222222222222 x 100 = 2102.22%