Answers

Add 18/72 and 42/28

1^st number: 18/72, 2^nd number: 1 14/28

18/72 + 42/28 is 7/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 28 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   18/72 = 18 × 7/72 × 7 = 126/504
3. Likewise, for the 2nd fraction, since 28 × 18 = 504,
   42/28 = 42 × 18/28 × 18 = 756/504
4. Add the two like fractions:
   126/504 + 756/504 = 126 + 756/504 = 882/504
5. 882/504 simplified gives 7/4
6. So, 18/72 + 42/28 = 7/4
   In mixed form: 13/4

MathStep (Works offline)

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

Related: ³⁶/₇₂+⁴²/₂₈ ¹⁸/₇₂+⁸⁴/₂₈ ¹⁸/₇₂+⁴²/₅₆ ⁵⁴/₇₂+⁴²/₂₈ ¹⁸/₇₂+⁴²/₈₄ ⁹⁰/₇₂+⁴²/₂₈

Add Fractions Calculator