Answers

Add 90/70 and 10/90

1^st number: 1 20/70, 2^nd number: 10/90

90/70 + 10/90 is 88/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   90/70 = 90 × 9/70 × 9 = 810/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   10/90 = 10 × 7/90 × 7 = 70/630
4. Add the two like fractions:
   810/630 + 70/630 = 810 + 70/630 = 880/630
5. 880/630 simplified gives 88/63
6. So, 90/70 + 10/90 = 88/63
   In mixed form: 125/63

MathStep (Works offline)

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

Related: ⁹⁰/₇₀+²⁰/₉₀ ⁹⁰/₇₀+³⁰/₉₀ ⁹⁰/₇₀+⁵⁰/₉₀ ⁹⁰/₇₀+⁷⁰/₉₀

Add Fractions Calculator