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Yes, God's people under the Law of Moses were taught to tithe. There are numerous scriptures that mention tithing.
However, as we look at the New Testament and the law of Christ, we do not read anything about tithing. We are told to give as we have been prospered (I Cor. 16:2), to give bountifully, cheerfully, not grudgingly or of necessity, but as we purpose in our hearts (II Cor. 9:6-9). No percent is ever stated.
Jesus talked about our use of our money on several occasions and taught us to be generous. He commended the widow in Luke 21:1-4 for her liberality.
Paul told Timothy in I Timothy 6:17-19 to command the rich to be ready to give and willing to share. Many more passages talk about sharing what we have.
There are those who take the fact that no percent in mentioned in the New Testament to mean that we now can give less than 10% since no tithing is necessary. Since we know we have greater blessings in Christ than did the Jews in the Old Testament, I would suggest we should try to be more liberal and give in excess of 10% if at all possible. Most in this country with the prosperity we enjoy should be able to do so. I realize there are some not so blessed.
I hope these few comments are helpful to you. If you have further questions, I would be pleased to respond to them.