Posted by brianna on Tuesday, January 13, 2009 at 7:09pm.
Jermaine had dinner at his favorite restaurant. It the sales tax rate is 4% & the sales tax on the meal was $1.25, what was the total cost of the meal, including sales tax and a 15% tip

math (ugh)  Ms. Sue, Tuesday, January 13, 2009 at 7:24pm
0.04x = 1.25
x = 1.25/0.04
x = 31.25
31.25 * 1.15 = ??

math (ugh)  brianna, Tuesday, January 13, 2009 at 7:47pm
where did you get the 1.15, do u mean 1.25?

math (ugh)  Ms. Sue, Tuesday, January 13, 2009 at 8:03pm
1.15 is the amount of the tip plus the meal.
You could also do it this way.
31.25 * 0.15 = 4.69
31.25 + 4.69 = ?

math (ugh)  math (whoopie!!!), Tuesday, January 13, 2009 at 8:09pm
TAX: $1.25
RATE: 0.04
TIP: 0.15
TOTAL = MEAL + TIP
MEAL = TAX/RATE = $1.25/0.04 = $31.25
TIP = MEAL*TIP PERCENTAGE = $31.25*0.15 = $4.69
TOTAL = MEAL + TIP = $31.25 + $4.69 = $35.94
(or, instead of adding the tip to the meal, you could multiply the meal by 1.15, which is like multiplying the meal by 0.15 and then adding that to the meal to get the tip + meal)

math (ugh)  ms.sue, Monday, May 12, 2014 at 10:04pm
37.19
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