Sandra scores 12 out of 30 in her maths test. Write this as a fraction in its simplest form.​

Step-by-step explanation:

12/30

find highest common factor; 6

divide both sides by 6

(12/6) (30/6)

2/5

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

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answer: for each 3 girls there is 2 boys . 3: 2

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