Answers

Add 60/70 and 42/21

1^st number: 60/70, 2^nd number: 2 0/21

60/70 + 42/21 is 20/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 21 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 70 × 3 = 210,
   60/70 = 60 × 3/70 × 3 = 180/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   42/21 = 42 × 10/21 × 10 = 420/210
4. Add the two like fractions:
   180/210 + 420/210 = 180 + 420/210 = 600/210
5. 600/210 simplified gives 20/7
6. So, 60/70 + 42/21 = 20/7
   In mixed form: 26/7

MathStep (Works offline)

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

Related: ⁶⁰/₇₀+⁸⁴/₂₁ ⁶⁰/₇₀+⁴²/₆₃

Add Fractions Calculator