There is something very wonderful about praying in agreement with our fellow men. It is something that surpasses all my mathematical thinking, just like five people chasing a hundred and also a hundred putting ten thousand to flight. If we are going analyze what was written in Leviticus 26:8 mathematically when five chase a hundred, it means that they are chasing them at a ratio of 1,20, that is, one chases 20.
So, you would expect that hundred people would put two thousand people to flight but intend they chase ten thousand. That is five times each individual's initial capacity. There is yet another stronger way to prayers of agreement and from what the Lord Jesus said in Matthew 18:19-20 if you have been asking Him for something just by yourself and the Lord has been ignoring you when you find another to join you in a prayer of agreement, the Lors will for sure answer.
When Christians come together to pray in agreement, the heavens are opened. A very good instance is what occurred at the Upper room in Acts 2:1-2.
Another good instance is when the Christians came together to pray for the release of Apostle Peter from prison. When Christians are really in agreement, not that two of them are fighting, but that they are in true agreement, God moves.
Probably the best method to put the prayer of agreement into demonstration is when you and your spouse come together to pray. Since the covenant between you and your spouse is stronger than the one you have with anybody else, then your prayers of agreement would carry huge power.