Finance & Business · pattern A, Numeric fields
Enter a net price and rate for the tax and gross price, with the reverse calculation that recovers the net amount from a tax-inclusive figure.
tax = net × rate; net = gross ÷ (1 + rate)
The reverse calculation divides rather than subtracts. Taking the rate off a gross figure by subtraction is the classic error and always understates the net amount.
8.25
To recover the net price from a tax-inclusive figure you divide by 1 plus the rate. Subtracting the rate from the gross figure gives a different, smaller number, because the tax was calculated on the net rather than on the gross. At 20% the two answers differ by 4% of the price — enough to matter on any real invoice.
If the number is not the part you are stuck on, that is what the service is for — a specialist who explains the working, not just the answer.
These are coursework tools. Nothing here is financial advice, no figure accounts for tax rules in your jurisdiction, and no result should be relied on for a real borrowing or investment decision.