INTRO
Tithe is bringing one tenth of every of your increase to the house of God.
And to my understanding, it is making sure 10% of your profit is not used for yourself but is given out to bless others.

How I Spent my Tithe
Out of the 10% tithe, I pay 5% to church and the remaining 5% to bless family, friends and strangers who come to ask me for money or who I felt needed assistance. The remaining 90% of my profit is solely mine to spend and make use of.

One of the reasons I don't pay all the 10% to church is because the church are not explicit about the amount of tithe they get or even how they spent it. Of course I know my church needs running cost like fuel, lightning, designs, furnishings and to pay some certain workers and that's why I set aside the 5% for them. But the truth is that I hardly see my church blessing the poor or the needy with this money which is the fundamental reason why God told us to pay it.

UNDERSTANDING TITHE
Your tithe is 10% of your increase. If someone gives you 20k or you record 20k as profit or paid salary of 20k, 2k which is 10% of 20k is your tithe to give out and the remaining 18k is yours alone to spend any how you see fit. Even if it is #50 profit you recorded, you can only spend 45 on yourself, the remaining 5 which is 10% of 50 should be to church or help someone. No matter what your increase is, you are to use only 90% for yourself and 10% for others. Even if you harvest fruits, you are to remove 10% of the fruits to give people or after selling all you remove 10% of the money to give church or people.

SCIENTIFIC AND MATHEMATICAL PROOF OF TITHE EFFICACY
Though I believe in God, but I don't want us to dwell on only the facts that God asked us to pay tithe so He can bless us. As a scientist, lets look at it from the mathematical perspective how tithe can be a source of blessings to people and have enough meat to go round.
As illustration, from your 20k profit, you gave someone (person A) 2k as tithe, from that 2k profit, person A also gave someone (person B) 200 which is 10% of his 2k, and person B also gave someone (person C) 20 which is 10% of 200 and so on. We all can agree that that such community of givers can never lack even down to their beggars as long as they also give our their 10%.

CONCLUSION

The truth is that people are really suffering and most people are finding it harder to give because they also hardly receive any help from anyone.
Let's keep helping one another and never get tired of doing it. Ofcourse if you have exhausted your 10% tithe may be for the month you can easily tell them you don't have anything on ground now and as soon as you record an increase you will give.

Please before some pastors come for my head note that the 5% is just my own method. You can decide to pay 7% or 9% to church and use the remaining 3% or 1% to bless people who ask you for favor cos I know they will surely come or the need will always arise where you have to help someone. Or you can pay all the 10% and still set aside a part of your money for gift or help to people whether family, friends or strangers. All am saying here is let's learn to give, never stop giving or get tired of giving, or say I have given too much. Let your profit dictates that. As long as the earth keeps blessing you, you should learn to bless others too and nature (God) will in turn continue to bless and help us all.

In this post, I try not to brag about my giving or delve much into the blessings of God one will receive as a result of giving but I can attest to it cause things are working fine for me.
Finally I leave you with the quote of a famous pastor - "Pay your tithe so things will not be tight for you."