-98.43% is the change from 957 to 15
Calculation steps:
[( 15 - 957 ) ÷ 957] x 100 = -98.43%
Formula
Percentage change = [(15 - 957) / 957] x 100
Subtract the new number by the original number
15 - 957 = -942
-942 ÷ 957 = -0.9843260188087775
-0.9843260188087775 x 100 = -98.43%