“Tithe” literally means one-tenth. It’s a mathematical term.
When Scripture talks about tithes and offerings, it means 10% (tithe) plus whatever you give beyond that (offering).
Pastor Kevin explains why he and his wife, Marcia, have agreed to tithe regardless of their circumstances – through times of hardship and times of abundance. PK explains that he can always afford to give, if he gives first. In other words, we may not be able to afford everything we want, but we can always afford to give.