-95.21% is the change from 313 to 15
Calculation steps:
[( 15 - 313 ) ÷ 313] x 100 = -95.21%
Formula
Percentage change = [(15 - 313) / 313] x 100
Subtract the new number by the original number
15 - 313 = -298
-298 ÷ 313 = -0.952076677316294
-0.952076677316294 x 100 = -95.21%