Macbook pro 13 inch 2017 W/ touch bar - battery drain during sleep
If you open Activity Monitor there is an Energy tab that will display what is consuming the most energy. One of the columns is "Preventing Sleep", which will allow you to see if any apps are preventing your Mac from sleeping. It could be that it isn't sleeping when you think it is.

If you leave Activity Monitor open for a while it will gather data and you can look through and see what the biggest culprits are for energy usage. You could have a program that hangs and uses more power than it's supposed to.