Answers

Add 90/70 and 9/80

1^st number: 1 20/70, 2^nd number: 9/80

90/70 + 9/80 is 783/560.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 70 × 8 = 560,
   90/70 = 90 × 8/70 × 8 = 720/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   9/80 = 9 × 7/80 × 7 = 63/560
4. Add the two like fractions:
   720/560 + 63/560 = 720 + 63/560 = 783/560
5. So, 90/70 + 9/80 = 783/560
   In mixed form: 1223/560

MathStep (Works offline)

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

Related: ⁹⁰/₇₀+¹⁸/₈₀ ⁹⁰/₇₀+²⁷/₈₀ ⁹⁰/₇₀+⁴⁵/₈₀ ⁹⁰/₇₀+⁶³/₈₀

Add Fractions Calculator