Question

You can buy 3 sandwiches for 4:$4.95 or 4 sandwiches for $6.72.Which is a better buy?

Answer 1

The unit rates for the first one id 1.65..The second one is 1.68.....So the first one is better..

Answer 2

If you would like to know which one of the options is better to buy, you can calculate this using the following steps:

3 sandwiches ... $4.95
1 sandwich ... $x = ?
______________________
3 * x = 1 * 4.95 /3
x = 4.95 / 3 = $1.65


4 sandwiches ... $6.72
1 sandwich ... $y = ?
______________________
4 * y = 1 * 6.72 /4
y = 6.72 / 4 = $1.68

Result: You should buy sandwiches from the first option ($1.65 < $1.68 per unit).