Answers

Add 63/7 and 15/90

1^st number: 9 0/7, 2^nd number: 15/90

63/7 + 15/90 is 55/6.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 7 × 90 = 630,
   63/7 = 63 × 90/7 × 90 = 5670/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   15/90 = 15 × 7/90 × 7 = 105/630
4. Add the two like fractions:
   5670/630 + 105/630 = 5670 + 105/630 = 5775/630
5. 5775/630 simplified gives 55/6
6. So, 63/7 + 15/90 = 55/6
   In mixed form: 91/6

MathStep (Works offline)

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

Related: ⁶³/₇+³⁰/₉₀ ⁶³/₁₄+¹⁵/₉₀ ⁶³/₇+⁴⁵/₉₀ ⁶³/₂₁+¹⁵/₉₀ ⁶³/₇+⁷⁵/₉₀ ⁶³/₃₅+¹⁵/₉₀ ⁶³/₄₉+¹⁵/₉₀

Add Fractions Calculator