Answers

Add 21/28 and 3/35

21/28 + 3/35 is 117/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 35 is 140
2. For the 1st fraction, since 28 × 5 = 140,
   21/28 = 21 × 5/28 × 5 = 105/140
3. Likewise, for the 2nd fraction, since 35 × 4 = 140,
   3/35 = 3 × 4/35 × 4 = 12/140
4. Add the two fractions:
   105/140 + 12/140 = 105 + 12/140 = 117/140

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