Answer:
Its not the same
Explanation:
Hey there!
I would respond to him by telling him that its first 15% off then you can add the 10%
First, you would take out the 15% from $24.99 which would make the price $21.25.
Then you would take out the 10% which makes the final price $19.13
This is because the 10% was added later.
If you took out 25% in the begining the final price would be $18.75 not $19.13