6433.33% is the change from 15 to 980
Calculation steps:
[( 980 - 15 ) ÷ 15] x 100 = 6433.33%
Formula
Percentage change = [(980 - 15) / 15] x 100
Subtract the new number by the original number
980 - 15 = 965
965 ÷ 15 = 64.33333333333333
64.33333333333333 x 100 = 6433.33%