The final price of a cafe, including the 10% GST, is $137.50. What is the pre-GST price of the meal?

To find the pre-GST price of the meal, you need to reverse the GST calculation. Here are the steps:

1. First, understand that the final price is made up of 100% of the original price plus 10% GST. This means the final price is 110% of the original price.

2. To find the original price (pre-GST), you need to consider the final price as 110% (because it includes the 10% GST).

3. Now, to find the 100% (original price), divide the final price by 110 and then multiply by 100.

4. So, the calculation will be: (137.50 / 110) * 100

5. This gives you the pre-GST price of the meal.