Answers

Add 42/70 and 90/24

1^st number: 42/70, 2^nd number: 3 18/24

42/70 + 90/24 is 87/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 24 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 70 × 12 = 840,
   42/70 = 42 × 12/70 × 12 = 504/840
3. Likewise, for the 2nd fraction, since 24 × 35 = 840,
   90/24 = 90 × 35/24 × 35 = 3150/840
4. Add the two like fractions:
   504/840 + 3150/840 = 504 + 3150/840 = 3654/840
5. 3654/840 simplified gives 87/20
6. So, 42/70 + 90/24 = 87/20
   In mixed form: 47/20

MathStep (Works offline)

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

Related: ⁸⁴/₇₀+⁹⁰/₂₄ ⁴²/₇₀+⁹⁰/₄₈ ⁴²/₇₀+⁹⁰/₇₂

Add Fractions Calculator