-84.59% is the change from 318 to 49
Calculation steps:
[( 49 - 318 ) ÷ 318] x 100 = -84.59%
Formula
Percentage change = [(49 - 318) / 318] x 100
Subtract the new number by the original number
49 - 318 = -269
-269 ÷ 318 = -0.8459119496855346
-0.8459119496855346 x 100 = -84.59%