A box contains 7 black pencils and 28 blue onew what is the ratio between the black and blue pens

The ratio between the black and blue pens   or 0.25 or 1:4.

Given to us,

Number of black pens box contains = 7,

Number of blue pens box contains = 28,

Putting in the values we get,

The ratio between the black and blue pens  ,

Hence, the ratio between the black and blue pens   or 0.25 or 1:4.

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1 : 4

Step-by-step explanation:

7 black : 28 blue = 7/28 ---> reduces to 1/4 ---> 1 : 4

a: 1/6, j: 1/4

step-by-step explanation: you are welcome