Answers

Add 3/63 and 81/80

1^st number: 3/63, 2^nd number: 1 1/80

3/63 + 81/80 is 1781/1680.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 80 is 5040
   
   Next, find the equivalent fraction of both fractional numbers with denominator 5040
2. For the 1st fraction, since 63 × 80 = 5040,
   3/63 = 3 × 80/63 × 80 = 240/5040
3. Likewise, for the 2nd fraction, since 80 × 63 = 5040,
   81/80 = 81 × 63/80 × 63 = 5103/5040
4. Add the two like fractions:
   240/5040 + 5103/5040 = 240 + 5103/5040 = 5343/5040
5. 5343/5040 simplified gives 1781/1680
6. So, 3/63 + 81/80 = 1781/1680
   In mixed form: 1101/1680

MathStep (Works offline)

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

Related: ⁶/₆₃+⁸¹/₈₀ ⁹/₆₃+⁸¹/₈₀ ¹⁵/₆₃+⁸¹/₈₀ ²¹/₆₃+⁸¹/₈₀

Add Fractions Calculator