Need some help with this one Two questions

Answer:
4,54
Step-by-step explanation:
what i find useful is if you flip the percentage of whatever, it makes it pretty easy. in this situation itd be 50% of 8, which is 4. for the total price, you just add the tax to the price
Answer:
.4
Step-by-step explanation:
i belive i did this wrong i havent done that in awhile