"My income is $1399.00. I have to pay 30% of $1399.00 in rent. How much do I have to pay monthly in rent? how much is 30% of $1399.00 per month.please calculate my percentage, I would have to pay using 30% of $1399.00."
Amt = (% written as decimal) x rate.
Change % to decimal by moving the decimal point TWO places, LEFT. Your RATE is the money you started with; the $1,399. So your equation ends up being:
Amt = 0.30 x 1399; (you see how I got the numbers? 30% is 0.3; and 1399 is the rate.
Amt = 419.70 for the rent.