Question

5/8 - 3/10=
a. 13/40
b. 1/20
c. 1/4
d. 1/5
i tink it's D

Answer 1

\[\frac{ 5 }{ 8 } = \frac{ 50 }{ 80 }\]
\[\frac{ 3 }{ 10 } = \frac{ 24 }{ 80 }\]
\[50-24=26\]
\[\frac{ 26 }{ 80 } = \frac{ 13 }{ 40 }\]

Answer 2

@hkim how did you get that?

Answer 3

Which part don't you get?

Answer 4

the first two. i am trying another one like it so thats why.

Answer 5

I just found the common denominator. The first denominator is 8, and the second denominator is 10. If you just multiply by the denominator of the other, so if you have a 5/8 and multiply it by 10, then multiply 3/10 and multiply it by 8, then you should get the denominator the same for both.