How do work out 2 3/4a=19 1/4
2.75a=19.25 19.25/2.75a = 7- So basically what I did was convert 2 3/4 and 19 1/4 into decimals. From there I divided 2 3/4 (2.75) by 19 1/4 (19.25) and I got 28.- The numbers in parenthesis is the numbers in decimals. - I hope that helps!!!!!