verb
deduct
dih-DUKT/dɪˈdʌkt/
To take an amount away from a total.
The man deducts three coins from ten, leaving seven on the table.

Etymology
The underlying image is “leading or bringing away.” Deduct applies that removal to counting or estimating: an amount is taken away from a total.
In context
You mean that's all I have to do is have the toilet repaired and deduct the bill from my rent? Yes.
More examples
- Please deduct the deposit from the final bill.
- My employer deducts health insurance premiums from each paycheck.
- You can deduct eligible expenses when calculating your taxable income.
Forms
deduct · deducts · deducted · deducting
deduction noun — An amount subtracted from a total.