Multiply 6% and 15% separately by $275,000.00.
To do this you must convert percentages to decimals. 6% converts to .06 and 15% converts to .15. You move the decimal point to the left two places as I have just done.
Closing cost: 275,000 x .06 = 16,500.00
Down Payment: 275,000 x .15 = 41,250.00