I need help with this maths question

Klein read 30 pages of a book on monday and 1/8 of the book on tuesday. he completed the remaining 1/4 of the book on wendesday. how many pages are there in the book?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

To determine the number of deer in a forest a forest ranger tags 280 and releases them back