– IF AFTER TAX YOU PAY $56.42 FOR AN ITEM THAT HAS

A SALE PRICE OF $52, WHAT IS THE SALES TAX

PERCENTAGE? WELL, THE INCREASE

FROM THE SALE PRICE TO THE PRICE YOU PAY

REPRESENTS THE AMOUNT OF TAX. SO WE’LL FIRST DETERMINE

THE AMOUNT OF TAX AND THEN WE’LL DETERMINE

WHAT PERCENT THAT TAX IS OF THE SALE’S PRICE. SO THE TAX AMOUNT EQUALS

THE PRICE YOU PAID MINUS THE SALE PRICE. SO IN THIS CASE,

THE TAX AMOUNT WOULD BE $4.42. AND NOW TO ANSWER THE QUESTION. WHAT IS THE PERCENT

OF SALES TAX? WE WANT TO BE ABLE

TO WRITE A SIMPLE QUESTION WHICH WE CAN THEN TRANSLATE

INTO A PERCENT EQUATION. SO WHAT WE REALLY WANT

TO KNOW IS, $4.42 IS WHAT PERCENT

OF THE SALE PRICE, WHICH IS $52? NOW LET’S GO AHEAD AND TRANSLATE

THIS INTO A PERCENT EQUATION USING THE KEYWORDS. SO WE HAVE 4.42,

“IS” MEANS EQUALS. WHAT NUMBER OR WHAT PERCENT

REPRESENTS THE UNKNOWN. LET’S GO AHEAD AND USE P

FOR OUR VARIABLE. THIS WILL REMIND US THAT OUR

ANSWER MUST BE A PERCENTAGE. THEN WE HAVE “OF,”

WHICH MEANS MULTIPLICATION. AND THEN WE HAVE $52. SO TO SOLVE THIS EQUATION

FOR P, WE HAVE TO UNDO

THIS MULTIPLICATION. SO WE’RE GOING TO DIVIDE

BOTH SIDES BY 52 OR $52. LET’S USE OUR CALCULATOR

TO DETERMINE THIS PERCENTAGE. WE HAVE 4.42 DIVIDED BY 52. SO NOTICE HOW THIS IS GIVING US

THE PERCENT AS A DECIMAL. SO TO CONVERT THIS

TO A PERCENTAGE, WE NEED TO MULTIPLY BY 100.

SO THE TAX RATE IS 8.5%. SO OUR SOLUTION HERE

WAS P=0.085, WHICH AS A PERCENTAGE,

AS WE SAID, IS 8.5%.

What program are you using to draw this?

Thank you! You're a grade saver!

thanx u really help

help is greatly appreciated

Thank you, nicely explained!

Appreciate, very well explained!

I've been struggling to understand this for DAYS; I finally understood it with your video!!! THANKS!!!

very helpful

Hi 7th graders

thank you sooooo much, you really helped with my problem