-67.26% is the change from 391 to 128
Calculation steps:
[( 128 - 391 ) ÷ 391] x 100 = -67.26%
Formula
Percentage change = [(128 - 391) / 391] x 100
Subtract the new number by the original number
128 - 391 = -263
-263 ÷ 391 = -0.6726342710997443
-0.6726342710997443 x 100 = -67.26%