Fill in the missing fraction problem

Question

Hi, I'm Kyra. I need help with a specific problem with a fraction. All you need to do is find the missing part of a fraction. Please solve this question for me below if you could.

5/7 of Blank is equal to 5/21

Do you think you could solve this problem? Thanks for your help and support if you helped me solve this problem.

Answer 1

5/7 times x = 5/21

(5/7)x = 5/21

x = (5/21)(7/5) = 1/3

the 5's cancel, and 21/7 = 3

or if you don't see just multiply it out

x = (5)(7)/(21)(5) = 35/105 = 1/3

105/35= 3, or use a calculator

the original problem was 5/7 times blank = 5/21

5/7 x 1/3 = (5)(1)/(7)(3) = 5/21

multiply numerators and divide by the product of the denominators