Answers

Add 21/80 and 98/40

1^st number: 21/80, 2^nd number: 2 18/40

21/80 + 98/40 is 217/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 40 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 80 × 1 = 80,
   21/80 = 21 × 1/80 × 1 = 21/80
3. Likewise, for the 2nd fraction, since 40 × 2 = 80,
   98/40 = 98 × 2/40 × 2 = 196/80
4. Add the two like fractions:
   21/80 + 196/80 = 21 + 196/80 = 217/80
5. So, 21/80 + 98/40 = 217/80
   In mixed form: 257/80

MathStep (Works offline)

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

Related: ⁴²/₈₀+⁹⁸/₄₀ ²¹/₈₀+⁹⁸/₈₀ ⁶³/₈₀+⁹⁸/₄₀

Add Fractions Calculator