change - money returned to someone as the balance of the sum paid for something
keep - take it for yourself
A : It costs $45 miss.
B : Here is $50. You can keep the change.
A : Thank you. Have a good day.
Both sentences can be used.
1. This is saying that he/she should not bother to give the change back and that he/she should keep it.
2. This is clearly indicating that whatever is left over (change) is theirs to keep.
これら両方を使うことができます。
1. This is saying that he/she should not bother to give the change back and that he/she should keep it.
2. This is clearly indicating that whatever is left over (change) is theirs to keep.
When you are at a restaurant, and want to tell the waiter/waitress that you do not need change, you can say:
"Keep the change."
"Don't worry about the change."
レストランでウェイター/ウェイトレスに「お釣りは要りません」と伝えたいなら、次のように言えます。
"Keep the change."
"Don't worry about the change."
(お釣りは要りません)