In latoya’s school 3 8 of the students have a blood type of o+, and 1 12 of the students have a blood type of o–. what fraction of the students in latoya’s school has a blood type of o+ or o–?

combine the fractions of each type by adding them

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Before we can add the fractions we require them to have the same denominator

To achieve this we require the lowest common multiple (LCM ) of 8 and 12

The LCM of 8 and 12 is 24

To change the denominators , multiply the numerator/ denominator by the appropriate value

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Add the numerators leaving the denominator as it is

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example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.