Answers

Add 75/70 and 30/80

1^st number: 1 5/70, 2^nd number: 30/80

75/70 + 30/80 is 81/56.

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,
   75/70 = 75 × 8/70 × 8 = 600/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   30/80 = 30 × 7/80 × 7 = 210/560
4. Add the two like fractions:
   600/560 + 210/560 = 600 + 210/560 = 810/560
5. 810/560 simplified gives 81/56
6. So, 75/70 + 30/80 = 81/56
   In mixed form: 125/56

MathStep (Works offline)

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

Related: ⁷⁵/₇₀+⁶⁰/₈₀ ⁷⁵/₇₀+⁹⁰/₈₀

Add Fractions Calculator