When you lease minerals, you are paid a bonus of $XXXX per net mineral acre. The lease will describe the gross acres of say 500 acres. But your share may only be 1/5 and so you own 100 net mineral acres. Generally, you will not receive additional money until a well is drilled and then you receive royalties at the rate in the lease. If the well is drilled on the 500 acres and you own 100 NMA and the royalty is 1/4, then you will receive 100 NMA/500 Gross Ac X 1/4 = 0.05000 X sales. If you own only 1/10 of the minerals (50 NMA), then your royalty decimal will be 50/500 X 1/4 = 0.025. So you will be paid less. If the sales from the well are $10,000 and your decimal is 0.025, you will receive $10,000 X 0.025 = $250. Many people own very small percentages of the minerals as the number of owners increases from generation to generation. If Grandpa owned 100 acres and had 10 children, then each only gets 10 acres. If child A has 5 children, then each will get 1/5 X 10 = 2 acres. You need to learn how many net mineral acres you own.
If you have producing wells on some tracts, then they are under lease and your royalty decimal will depend on the lease royalty rate (1/4 or 3/18 or 1/8) and your net share of the acres in the well. It is unclear what you mean about the 5th area and its ‘agreement’. Is this under lease with a new well? Or are you waiting for a lease? If it is already under lease and there is a new well, you will receive a division order from the operator which will state your royalty decimal. Be sure that you understand what you sign as it is a legal document and you will be bound by the terms and provisions. There are some untrustworthy people in this business (as in so many areas) and they may propose a lower royalty rate than normal or have you sign a sale document rather than a lease.