Answers

Add 30/84 and 54/80

30/84 + 54/80 is 289/280.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 84 × 20 = 1680,
   30/84 = 30 × 20/84 × 20 = 600/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   54/80 = 54 × 21/80 × 21 = 1134/1680
4. Add the two like fractions:
   600/1680 + 1134/1680 = 600 + 1134/1680 = 1734/1680
5. 1734/1680 simplified gives 289/280
6. So, 30/84 + 54/80 = 289/280
   In mixed form: 19/280

MathStep (Works offline)

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

Related: ⁶⁰/₈₄+⁵⁴/₈₀ ⁹⁰/₈₄+⁵⁴/₈₀

Add Fractions Calculator