To find the solution to this problem, you simply need to multiply 1/5 times 45 (in mathematics, the word "of" pretty much always means "multiply").
1/5 * 45
We can convert 45 into a fraction to make the problem easier by simply putting a 1 underneath it
[tex] \frac{1}{5} * \frac{45}{1} [/tex]
Then, you just multiply the numerators (the numbers on top of the fractions) and the denominators (the numbers on the bottom)
1 * 45 = 45
1 * 5 = 5
So, we're left with this fraction:
[tex] \frac{45}{5} [/tex]
Then, we just divide the fraction to get the answer
45 / 5 = 9
1/5 of 45 = 9
Hope that helped =)
