-84.29% is the change from 312 to 49
Calculation steps:
[( 49 - 312 ) ÷ 312] x 100 = -84.29%
Formula
Percentage change = [(49 - 312) / 312] x 100
Subtract the new number by the original number
49 - 312 = -263
-263 ÷ 312 = -0.842948717948718
-0.842948717948718 x 100 = -84.29%