3203.33% is the change from 30 to 991
Calculation steps:
[( 991 - 30 ) ÷ 30] x 100 = 3203.33%
Formula
Percentage change = [(991 - 30) / 30] x 100
Subtract the new number by the original number
991 - 30 = 961
961 ÷ 30 = 32.03333333333333
32.03333333333333 x 100 = 3203.33%