What is the portion if the base is 900 and the rate is 12 3/4

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The number of lines of symmetry of any regular polygon is equal to the number of sides.

To find the portion, we need to multiply the base by the rate. In this case, the base is 900 and the rate is 12 3/4.

First, convert the mixed number 12 3/4 to an improper fraction. To do this, multiply the whole number (12) by the denominator (4), and add the numerator (3). Then, put the result over the original denominator.

12 * 4 = 48
48 + 3 = 51
51/4 = 12 3/4

So, the rate 12 3/4 can be written as 51/4.

Next, multiply the base (900) by the rate (51/4):

900 * (51/4) = 45900/4 = 11475

Therefore, the portion is 11,475.