Adjectival noun in this sentence 50 My understand for this sentence is "If you cancel the day before, we will get 50% of the cancelling fee" (there's a fixed cancelling fee) PS. In case my English sentence above is not understandable -> If you cancel the day before, you will have to pay 50% of the canceling fee (for example, a fixed cancelling fee is 100 USD. You cancelled the order so you have to pay 50% of the cancelling fee which is 50 USD ) Please correct me

Please see the word order carefully.

* 50 = "[a / the] 50% cancellation fee" or "cancellation fee of 50%" (i.e., 50% of the full fee you'd be charged if you didn't cancel)
* 50% = "50% of the cancellation fee" (i.e., half of the fixed cancellation fee; indeed, this doesn't make much sense in practice)



The former (which is what the sentence uses) means, for example, that if you booked a hotel for 10,000 yen and cancelled it the day before, you'd have to pay 5,000 yen as the cancellation fee.

See also: What's the difference between and ?