-98.12% is the change from 957 to 18
Calculation steps:
[( 18 - 957 ) ÷ 957] x 100 = -98.12%
Formula
Percentage change = [(18 - 957) / 957] x 100
Subtract the new number by the original number
18 - 957 = -939
-939 ÷ 957 = -0.9811912225705329
-0.9811912225705329 x 100 = -98.12%