-42.91% is the change from 515 to 294
Calculation steps:
[( 294 - 515 ) ÷ 515] x 100 = -42.91%
Formula
Percentage change = [(294 - 515) / 515] x 100
Subtract the new number by the original number
294 - 515 = -221
-221 ÷ 515 = -0.429126213592233
-0.429126213592233 x 100 = -42.91%