1 year= 12 months
CONVERT BOTH TO MONTHS
(3 yrs * 12 mos/yr) + 4 mos = 40 mos
(1yr * 12 mos/yr) + 11 mos = 23
SUBTRACT MONTHS
40 mos - 23 mos= 17 mos
DIVIDE TO FIND # YEARS/MONTHS
17 mos ÷ 12 mos/yr= 1 year 5 months
ANSWER: 1 year 5 months
Hope this helps! :)