6386.67% is the change from 15 to 973
Calculation steps:
[( 973 - 15 ) ÷ 15] x 100 = 6386.67%
Formula
Percentage change = [(973 - 15) / 15] x 100
Subtract the new number by the original number
973 - 15 = 958
958 ÷ 15 = 63.86666666666667
63.86666666666667 x 100 = 6386.67%