-98.45% is the change from 966 to 15
Calculation steps:
[( 15 - 966 ) ÷ 966] x 100 = -98.45%
Formula
Percentage change = [(15 - 966) / 966] x 100
Subtract the new number by the original number
15 - 966 = -951
-951 ÷ 966 = -0.984472049689441
-0.984472049689441 x 100 = -98.45%