Answer:
Amount left = $12 - $6.25 = $5.75
Explanation:
Caroline has $25 to spend on the school field trip. This means the total amount she has to spend is $25
She paid $13 for the field trip. This is actually lesser than the amount she had to pay for the field trip. After paying $13 for the field trip, what she has left is
$25 - $13 = $12
Next, she bought lunch from the remaining money( what she had left after paying for the field trip).
The cost of the lunch is $6.25
The final amount she had left is $12 minus the cost of her lunch
Amount left = $12 - $6.25 = $5.75