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Find the LCD,then change the denominator of its LCD.
Ex. 2 1/3 = 2 8 / 24
+3 1/8 =. 3 3/24
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5 11 /24
We change the numerator 1 and 1 to 2 and 3 because we will count if how many times the denominator is multiplied.

my example is the shortcut of how to solve mixed no.

The LCD is 12 .

because we skip count it

The most least is 12 so thats why 12 is the LCD

12 divided by 3 is 4

12 divided by 2 is 6

so the answer is 4/6