Answers

Add 30/28 and 90/60

1^st number: 1 2/28, 2^nd number: 1 30/60

30/28 + 90/60 is 18/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 28 × 15 = 420,
   30/28 = 30 × 15/28 × 15 = 450/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   90/60 = 90 × 7/60 × 7 = 630/420
4. Add the two like fractions:
   450/420 + 630/420 = 450 + 630/420 = 1080/420
5. 1080/420 simplified gives 18/7
6. So, 30/28 + 90/60 = 18/7
   In mixed form: 24/7

MathStep (Works offline)

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

Related: ⁶⁰/₂₈+⁹⁰/₆₀ ³⁰/₅₆+⁹⁰/₆₀ ⁹⁰/₂₈+⁹⁰/₆₀ ³⁰/₈₄+⁹⁰/₆₀

Add Fractions Calculator