The answer is 5/2 so here’s how you get ur answer u have 2.5 and put a 1 as your denominator so it should look like this 2.5/1 then u need to take the decimal out of there so you have to count the numbers after the decimal in 2.5 then multiply the numerator and denominator by 100 if it is 1 number, 100 if it’s 2 numbers, 1000. so you multiply both numerator and denominator by 10 to get 25/10 then find the greatest common denominator of 25 and 10 divide 5 by 25 and 10 then u should get 5/2