Respuesta :

Luv2Teach

Answer:

Step-by-step explanation:

Percent increase/decrease has a formula:

[tex]\frac{orig-sale}{orig}*100=%inc/dec[/tex]

For us, this looks like:

[tex]\frac{400-350}{400}*100[/tex]

which simplifies to

[tex]\frac{50}{400}*100[/tex]

which is 12.5%