-87.98% is the change from 391 to 47
Calculation steps:
[( 47 - 391 ) ÷ 391] x 100 = -87.98%
Formula
Percentage change = [(47 - 391) / 391] x 100
Subtract the new number by the original number
47 - 391 = -344
-344 ÷ 391 = -0.8797953964194374
-0.8797953964194374 x 100 = -87.98%