Answers

Add 16/42 and 72/20

1^st number: 16/42, 2^nd number: 3 12/20

16/42 + 72/20 is 418/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 42 × 10 = 420,
   16/42 = 16 × 10/42 × 10 = 160/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   72/20 = 72 × 21/20 × 21 = 1512/420
4. Add the two like fractions:
   160/420 + 1512/420 = 160 + 1512/420 = 1672/420
5. 1672/420 simplified gives 418/105
6. So, 16/42 + 72/20 = 418/105
   In mixed form: 3103/105

MathStep (Works offline)

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

Related: ³²/₄₂+⁷²/₂₀ ¹⁶/₈₄+⁷²/₂₀ ¹⁶/₄₂+⁷²/₄₀ ⁴⁸/₄₂+⁷²/₂₀ ¹⁶/₄₂+⁷²/₆₀ ⁸⁰/₄₂+⁷²/₂₀

Add Fractions Calculator