To write 5/1 as a fraction with a common denominator, multiply by 2/2
5/1 2/2-3/1
5*2/2-3/2
5*2-1*3/2
you get 7/2
which would be the exact form
in decimal form it would be: 3.5
in mixed number form it would be: 3 1/2
thank you
hope this helped
Best Regards Queen Z