ICloud backups take up too much space for amount of data?

For a few years I've been paying for extra storage in my iCloud. I don't use the account much anymore because it is from when I was younger, but I still like to keep things on it like photos and such. I want to downgrade because I don't want to pay for something I don't use often, but I have too much storage to downgrade. I'm confused about this though. It says my photos take up 3.7 GB of space which is fine, but then it says my backups (which doesn't include photos, they are backed up separately) take up 4.9 GB of space which seems far too high. I shut off and deleted backups for almost everything, except for four apps. Those apps all together take up about 507 MB of space, not even a full GB, so I don't know why I don't have any space.

Just buy more space, when you're dealing with the apple franchise. It's all money.

Most of the time it's because you are keeping multiple backups of old phones. You need to delete the older backup if you see multiple there since it's likely redundant. Also you should setup the Google Photos app and have your pictures\videos back up to that for free and just turn off your iCloud Photos backup (yes it works on iPhones).