Answers

Add 90/20 and 6/72

1^st number: 4 10/20, 2^nd number: 6/72

90/20 + 6/72 is 55/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 20 × 18 = 360,
   90/20 = 90 × 18/20 × 18 = 1620/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   6/72 = 6 × 5/72 × 5 = 30/360
4. Add the two like fractions:
   1620/360 + 30/360 = 1620 + 30/360 = 1650/360
5. 1650/360 simplified gives 55/12
6. So, 90/20 + 6/72 = 55/12
   In mixed form: 47/12

MathStep (Works offline)

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

Related: ⁹⁰/₂₀+¹²/₇₂ ⁹⁰/₄₀+⁶/₇₂ ⁹⁰/₂₀+¹⁸/₇₂ ⁹⁰/₆₀+⁶/₇₂ ⁹⁰/₂₀+³⁰/₇₂ ⁹⁰/₂₀+⁴²/₇₂

Add Fractions Calculator