-94.23% is the change from 312 to 18
Calculation steps:
[( 18 - 312 ) ÷ 312] x 100 = -94.23%
Formula
Percentage change = [(18 - 312) / 312] x 100
Subtract the new number by the original number
18 - 312 = -294
-294 ÷ 312 = -0.9423076923076923
-0.9423076923076923 x 100 = -94.23%