Answer:
20%
Step-by-step explanation:
1. subtract the new price from the original price
[tex]39.38-31.50=7.88[/tex]
2. divide the difference by the original number
[tex]7.88[/tex] ÷ [tex]39.38[/tex][tex]=.2001[/tex]
3. multiply this number by 100
[tex](.2001)100=20%[/tex]