4 3/4 years equals: 57 months. The mixed number is solved by multiplying the whole part (4) by the denominator (4) and the numerator (3) is added, leaving the same denominator (4):
4 x 4 + 3 = 19, with the same denominator 19/4. Realizing the division the result is 4.75. Each year has 12 months, that is, 12 x 4 = 48 months and 0.75 years equals 12 x 0.75 = 9 months more. In total they would be 48 + 9 = 57 months
