What is 21 : 8 equivalent to? 7/6, 7 to 9, 7:8, 9/7

Answer 1

21/8 = 2.65 = none of the 4 choices

7/6 = 1.1666...

7/9 = 0.777...

7:8 = 0.875

9/7 = 1.285714285714...

BUT IF you really meant to type 21/18 then

21/18 = 7/6 = 7(3)/6(3). 7/6 x 3/3 = 21/18