Answers

Add 48/42 and 15/40

1^st number: 1 6/42, 2^nd number: 15/40

48/42 + 15/40 is 85/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   48/42 = 48 × 20/42 × 20 = 960/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   15/40 = 15 × 21/40 × 21 = 315/840
4. Add the two like fractions:
   960/840 + 315/840 = 960 + 315/840 = 1275/840
5. 1275/840 simplified gives 85/56
6. So, 48/42 + 15/40 = 85/56
   In mixed form: 129/56

MathStep (Works offline)

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

Related: ⁹⁶/₄₂+¹⁵/₄₀ ⁴⁸/₄₂+³⁰/₄₀ ⁴⁸/₈₄+¹⁵/₄₀ ⁴⁸/₄₂+¹⁵/₈₀ ⁴⁸/₄₂+⁴⁵/₄₀ ⁴⁸/₄₂+⁷⁵/₄₀

Add Fractions Calculator