True or False.

To find a sales tax of 6% on a purchase of $90.00 using the proportion method you would write the following:
6/100 = ST/$90?

Right.

To find a sales tax of 6% on a purchase of $90.00 using the proportion method you would write the following:

6/100 = ST/$90

The calculations in this problem would give you the following: (ST)= $540.00

True. To find the sales tax of 6% on a purchase of $90.00 using the proportion method, you would set up the following equation:

6/100 = ST/$90

Let me explain how we arrived at this equation:

1. Write the proportion: Since the sales tax is a percentage, we write it as 6/100, which is equivalent to 0.06.
So, we have 0.06 = ST/$90.

2. Cross-multiply: Multiply the values diagonally across the equal sign.
Multiply 0.06 by $90 to get the sales tax amount, represented by ST.

3. Solve for the unknown value: To find the sales tax amount, divide the product obtained in the previous step by 1.

Therefore, your equation should be 6/100 = ST/$90.