SOLUTION: I sent this problem in but no one helped me so here it is again: You order items from a menu that total $7.85. Your bill comes to $8.30, including the tax. What is the percent o

Question 110436: I sent this problem in but no one helped me so here it is again:
You order items from a menu that total $7.85. Your bill comes to $8.30, including the tax. What is the percent of the tax? Round to the nearest tenth. After you do the problem estimate a 15% tip for this order before the tax.

Thanks whoever does this a lot!!!!!!
Found 2 solutions by checkley71, edjones:
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
8.30-7.85=$.45 amount of tax
.45/7.85=.057 or .06 or 6% for the tax amount.
7.85*.15=$1.18 for the tip on the base price.

Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
let x=1+decimal of the tax.
7.85x=8.3
7.85x/7.85=8.3/7.85
x= 1.057
tax=(1.057-1)*100
=.057*100
5.7%
.
To calculate a 15% tip on 8.30:
move the decimal point one to the left (.83) and add 1/2 the result to the result. .83+.41=1.24 est.
Be a big spender and give $1.25
Ed
RELATED QUESTIONS
I sent this problem in a few days ago but no one helped me so I will try again! A... (answered by stanbon)
An airplane is flying 0.75 miles above the ground. If the pilot must begin a 4� descent... (answered by Earlsdon)
This is in algebra 2. Here is the word problem: Lisa can shovel snow from her driveway... (answered by user_dude2008)
Okay, I asked this one Friday and nobody got back to me so I am asking it again. Here is... (answered by checkley71,nycsharkman)
Let me try this again as I did not recieve the normal confirmation page that this was... (answered by jim_thompson5910)
Dear Tutors, I just wanted to thank each of you who helped me lately. I am awaiting my... (answered by edjones)
Hi its me again, I already ask this question last time but I still don't get it can you... (answered by josgarithmetic,math_tutor2020)
Nine tickets, numbered from 1 to 9, are in a box. If 2 tickets are drawn at random,... (answered by Earlsdon,Theo)
Consider a chef who must plan a banquet. Possible menu items and the cost data presented... (answered by onyulee)