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horrt
4:5
They both divide by 3 so 12 divided by 3 is 4 and 15 divided by 3 is 5

The simplest ratio of squares to total shapes is 4 : 9.

The question wants the ratio to the total number of shapes so first find the total number of shapes:

= Circles + squares

= 15 + 12

= 27 shapes

There are 12 squares and 27 shapes. The ratio is therefore:

= 12 : 27

Use the lowest common factor of both numbers to find the simplest ratio. That factor is 3:

= [tex]\frac{12}{3} : \frac{27}{3}[/tex]

= 4 : 9

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