Add 75/21 and 54/28, Solve 3 12/21 + 1 26/28 as a fraction

Add 75/21 and 54/28

1^st number: 3 12/21, 2^nd number: 1 26/28

75/21 + 54/28 is 11/2.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 21 × 4 = 84,
75/21 = 75 × 4/21 × 4 = 300/84
Likewise, for the 2nd fraction, since 28 × 3 = 84,
54/28 = 54 × 3/28 × 3 = 162/84
Add the two like fractions:
300/84 + 162/84 = 300 + 162/84 = 462/84
462/84 simplified gives 11/2
So, 75/21 + 54/28 = 11/2
In mixed form: 51/2

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