Answers

Add 72/90 and 8/42

72/90 + 8/42 is 104/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 42 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   72/90 = 72 × 7/90 × 7 = 504/630
3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
   8/42 = 8 × 15/42 × 15 = 120/630
4. Add the two like fractions:
   504/630 + 120/630 = 504 + 120/630 = 624/630
5. 624/630 simplified gives 104/105
6. So, 72/90 + 8/42 = 104/105

MathStep (Works offline)

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

Related: ⁷²/₉₀+¹⁶/₄₂ ⁷²/₉₀+⁸/₈₄ ⁷²/₉₀+²⁴/₄₂ ⁷²/₉₀+⁴⁰/₄₂ ⁷²/₉₀+⁵⁶/₄₂

Add Fractions Calculator