Answers

Add 21/80 and 98/60

1^st number: 21/80, 2^nd number: 1 38/60

21/80 + 98/60 is 91/48.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 60 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 80 × 3 = 240,
   21/80 = 21 × 3/80 × 3 = 63/240
3. Likewise, for the 2nd fraction, since 60 × 4 = 240,
   98/60 = 98 × 4/60 × 4 = 392/240
4. Add the two like fractions:
   63/240 + 392/240 = 63 + 392/240 = 455/240
5. 455/240 simplified gives 91/48
6. So, 21/80 + 98/60 = 91/48
   In mixed form: 143/48

MathStep (Works offline)

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

Related: ⁴²/₈₀+⁹⁸/₆₀ ⁶³/₈₀+⁹⁸/₆₀

Add Fractions Calculator