Question

Multiply. give your answer in simplest form. 20/21 x 9/28

Answer 1

5/21

Explanation:

20/21* 9/28

cross multiply

20 * 9

--- ---- 9 and 21 have like terms so divide them both by 9 and

21 28 20 and 28 have like terms so divide them both by 4

5 * 1

--- --- now multiply 5 by 1 and 3 by 7

3 7

5/21