I believe the answer is 78.54 , D
For the first one number 1,2 and 3 are prime cause it can only be times 1, and 4 is a composite because it is not prime it can be times not only by 1 but by 2 two do you understand it more now or do you need help still
You have to make the denominators (bottom numbers) the same via multiplication, it's best to do it to the first number they meet at. that would be fifteen (15)
5×3=15
3×5=15
you then have to multiply the numerators by the respective numbers.
2×3=6
1×5=5
you then subtract the numerators normally
6-5=1
slap back on the denominator
1/15
there's your answer.
(the number you multiply them by isn't the other denominator, it just happens to be the denominators for this equation)
