Subtract (verb)

1. To take away a quantity from another quantity.
2. To deduct.

Origin:

From sub- + tractare ("to handl.e")

Examples:

1. I need to subtract this number from that number.
2. She subtracted the cost of the materials from the total price.
3. You need to subtract the taxes from the total amount.
4. He subtracted the time spent on breaks from the total work hours.
5. I'm trying to subtract the calories from this meal from my daily total.