Add 54/84 and 75/20
1st number: 54/84, 2nd number: 3 15/20
54/84 + 75/20 is 123/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
54/84 = 54 × 5/84 × 5 = 270/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
75/20 = 75 × 21/20 × 21 = 1575/420 - Add the two like fractions:
270/420 + 1575/420 = 270 + 1575/420 = 1845/420 - 1845/420 simplified gives 123/28
- So, 54/84 + 75/20 = 123/28
In mixed form: 411/28
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