Answers

Add 42/10 and 72/63

1^st number: 4 2/10, 2^nd number: 1 9/63

42/10 + 72/63 is 187/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 63 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 10 × 63 = 630,
   42/10 = 42 × 63/10 × 63 = 2646/630
3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
   72/63 = 72 × 10/63 × 10 = 720/630
4. Add the two like fractions:
   2646/630 + 720/630 = 2646 + 720/630 = 3366/630
5. 3366/630 simplified gives 187/35
6. So, 42/10 + 72/63 = 187/35
   In mixed form: 512/35

MathStep (Works offline)

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

Related: ⁸⁴/₁₀+⁷²/₆₃ ⁴²/₂₀+⁷²/₆₃ ⁴²/₃₀+⁷²/₆₃ ⁴²/₅₀+⁷²/₆₃ ⁴²/₇₀+⁷²/₆₃

Add Fractions Calculator