-39.63% is the change from 487 to 294
Calculation steps:
[( 294 - 487 ) ÷ 487] x 100 = -39.63%
Formula
Percentage change = [(294 - 487) / 487] x 100
Subtract the new number by the original number
294 - 487 = -193
-193 ÷ 487 = -0.39630390143737165
-0.39630390143737165 x 100 = -39.63%