The answer is 1.3. First, divide both divisor and dividend by 10: 13 / 10 = (13 : 10) / (10 : 10). 13 / 10 = 1.3 / 1. Any number divided by 1 has the quotient equal to itself: 1.3 / 1 = 1.3. Therefore: 13 / 10 = (13 : 10) / (10 : 10) = 1.3 / 1 = 1.3.