Answers

Add 15/35 and 81/80

1^st number: 15/35, 2^nd number: 1 1/80

15/35 + 81/80 is 807/560.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 35 × 16 = 560,
   15/35 = 15 × 16/35 × 16 = 240/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   81/80 = 81 × 7/80 × 7 = 567/560
4. Add the two like fractions:
   240/560 + 567/560 = 240 + 567/560 = 807/560
5. So, 15/35 + 81/80 = 807/560
   In mixed form: 1247/560

MathStep (Works offline)

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

Related: ³⁰/₃₅+⁸¹/₈₀ ¹⁵/₇₀+⁸¹/₈₀ ⁴⁵/₃₅+⁸¹/₈₀ ⁷⁵/₃₅+⁸¹/₈₀

Add Fractions Calculator