Answers

Add 42/40 and 54/70

1^st number: 1 2/40, 2^nd number: 54/70

42/40 + 54/70 is 51/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 70 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 40 × 7 = 280,
   42/40 = 42 × 7/40 × 7 = 294/280
3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
   54/70 = 54 × 4/70 × 4 = 216/280
4. Add the two like fractions:
   294/280 + 216/280 = 294 + 216/280 = 510/280
5. 510/280 simplified gives 51/28
6. So, 42/40 + 54/70 = 51/28
   In mixed form: 123/28

MathStep (Works offline)

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

Related: ⁸⁴/₄₀+⁵⁴/₇₀ ⁴²/₈₀+⁵⁴/₇₀

Add Fractions Calculator