Question

medal to be awarded!!!!!!!!!!!!!

Answer 1

\[\frac{ 8 }{ 9 }-\frac{ 5 }{ 7 }\]

Answer 2

work out the value

Answer 3

Convert both of them to denominators of 63.

Answer 4

\(\sf\dfrac{8}{9} \rightarrow \dfrac{8 \times 7}{9 \times 7}\)

Answer 5

and then multiply them

Answer 6

wait so why 7?

Answer 7

\(\sf\dfrac{5}{7} \rightarrow \dfrac{5\times 9}{7 \times 9}\)

Answer 8

Because we want the denominator to be changed to 63.

Answer 9

i mean and then subtract

Answer 10

why 63 lol

Answer 11

And the denominator of 8/9 right now is 9.

63 / 9 = 7, so we multiply the numerator and denominator by 7.

Answer 12

bcz u have to find the least common factor of the denominators

Answer 13

63 because it's the least common multiple between 9 and 7.

Multiples of 9:

9, 18, 27, 36, 45, 54, 63, 72, 81, 90

Multiples of 7:

7, 14, 21, 28, 35, 42, 49, 56, 63, 70

Lowest number they have in common is 63.

Answer 14

ohhhhhhh omfg thnks i get it now!!!!!!!!!!!!!!!! ty peeps

Answer 15

No problem, so you can figure it out from here?

Answer 16

yep

Answer 17

Great