Answers

Add 72/63 and 42/80

1^st number: 1 9/63, 2^nd number: 42/80

72/63 + 42/80 is 467/280.

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,
   72/63 = 72 × 80/63 × 80 = 5760/5040
3. Likewise, for the 2nd fraction, since 80 × 63 = 5040,
   42/80 = 42 × 63/80 × 63 = 2646/5040
4. Add the two like fractions:
   5760/5040 + 2646/5040 = 5760 + 2646/5040 = 8406/5040
5. 8406/5040 simplified gives 467/280
6. So, 72/63 + 42/80 = 467/280
   In mixed form: 1187/280

MathStep (Works offline)

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

Related: ⁷²/₆₃+⁸⁴/₈₀

Add Fractions Calculator