Answers

Add 70/21 and 32/40

1^st number: 3 7/21, 2^nd number: 32/40

70/21 + 32/40 is 62/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 21 × 40 = 840,
   70/21 = 70 × 40/21 × 40 = 2800/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   32/40 = 32 × 21/40 × 21 = 672/840
4. Add the two like fractions:
   2800/840 + 672/840 = 2800 + 672/840 = 3472/840
5. 3472/840 simplified gives 62/15
6. So, 70/21 + 32/40 = 62/15
   In mixed form: 42/15

MathStep (Works offline)

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

Related: ⁷⁰/₂₁+⁶⁴/₄₀ ⁷⁰/₄₂+³²/₄₀ ⁷⁰/₂₁+³²/₈₀ ⁷⁰/₂₁+⁹⁶/₄₀ ⁷⁰/₆₃+³²/₄₀

Add Fractions Calculator