Answers

Add 90/60 and 20/72

1^st number: 1 30/60, 2^nd number: 20/72

90/60 + 20/72 is 16/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 60 × 6 = 360,
   90/60 = 90 × 6/60 × 6 = 540/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   20/72 = 20 × 5/72 × 5 = 100/360
4. Add the two like fractions:
   540/360 + 100/360 = 540 + 100/360 = 640/360
5. 640/360 simplified gives 16/9
6. So, 90/60 + 20/72 = 16/9
   In mixed form: 17/9

MathStep (Works offline)

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

Related: ⁹⁰/₆₀+⁴⁰/₇₂ ⁹⁰/₆₀+⁶⁰/₇₂

Add Fractions Calculator