Question

Find the products in simplest form.
8 5
21 16
23. 15 =
RETRY

Answer 1

8/21 . 5/16 = 5/42

12/25 . 15/16 = 9/20

Explanation:

16 = 2 x 8

8/21 . 5/16

= ( 8 x 5 ) / ( 21 x 16 )

= ( 8 x 5 ) / ( 21 x 2 x 8 )

= 5 / ( 21 x 2 )

= 5/42

12 = 3 x 4

15 = 3 x 5

25 = 5 x 5

16 = 4 x 4

12/25 . 15/16

= ( 3 x 4 ) / ( 5 x 5 ) . ( 3 x 5 ) / ( 4 x 4 )

= ( 3 x 4 x 3 x 5 ) / ( 5 x 5 x 4 x 4 )

= ( 3 x 3 ) / ( 5 x 4 )

= 9/20

Answer 2

part A

`(8)/(21) . \: (5)/(16) \\ \\ (5)/(42) \\ \\ 0.119`

part B

`(12)/(25) . \: (15)/(16) \\ \\ (9)/(20) \\ \\ 0.45`