Answers

Add 72/49 and 42/80

1^st number: 1 23/49, 2^nd number: 42/80

72/49 + 42/80 is 3909/1960.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 80 is 3920
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3920
2. For the 1st fraction, since 49 × 80 = 3920,
   72/49 = 72 × 80/49 × 80 = 5760/3920
3. Likewise, for the 2nd fraction, since 80 × 49 = 3920,
   42/80 = 42 × 49/80 × 49 = 2058/3920
4. Add the two like fractions:
   5760/3920 + 2058/3920 = 5760 + 2058/3920 = 7818/3920
5. 7818/3920 simplified gives 3909/1960
6. So, 72/49 + 42/80 = 3909/1960
   In mixed form: 11949/1960

MathStep (Works offline)

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

Related: ⁷²/₄₉+⁸⁴/₈₀ ⁷²/₉₈+⁴²/₈₀

Add Fractions Calculator