Answers

Add 63/42 and 9/45

1^st number: 1 21/42, 2^nd number: 9/45

63/42 + 9/45 is 17/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 45 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 42 × 15 = 630,
   63/42 = 63 × 15/42 × 15 = 945/630
3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
   9/45 = 9 × 14/45 × 14 = 126/630
4. Add the two like fractions:
   945/630 + 126/630 = 945 + 126/630 = 1071/630
5. 1071/630 simplified gives 17/10
6. So, 63/42 + 9/45 = 17/10
   In mixed form: 17/10

MathStep (Works offline)

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

Related: ⁶³/₄₂+¹⁸/₄₅ ⁶³/₈₄+⁹/₄₅ ⁶³/₄₂+⁹/₉₀ ⁶³/₄₂+²⁷/₄₅ ⁶³/₄₂+⁶³/₄₅

Add Fractions Calculator