Answers

Add 15/4 and 12/5

1^st number: 3 3/4, 2^nd number: 2 2/5

15/4 + 12/5 is 123/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 5 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 4 × 5 = 20,
   15/4 = 15 × 5/4 × 5 = 75/20
3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
   12/5 = 12 × 4/5 × 4 = 48/20
4. Add the two like fractions:
   75/20 + 48/20 = 75 + 48/20 = 123/20
5. So, 15/4 + 12/5 = 123/20
   In mixed form: 63/20

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ³⁰/₄+¹²/₅ ¹⁵/₄+²⁴/₅ ¹⁵/₈+¹²/₅ ¹⁵/₄+¹²/₁₀ ⁴⁵/₄+¹²/₅ ¹⁵/₄+³⁶/₅ ¹⁵/₁₂+¹²/₅ ¹⁵/₄+¹²/₁₅ ⁷⁵/₄+¹²/₅ ¹⁵/₄+⁶⁰/₅ ¹⁵/₂₀+¹²/₅ ¹⁵/₄+¹²/₂₅ ¹⁵/₄+⁸⁴/₅ ¹⁵/₂₈+¹²/₅ ¹⁵/₄+¹²/₃₅

Add Fractions Calculator