Answers

Add 21/35 and 28/70

21/35 + 28/70 is 1/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 70 is 70
   
   Next, find the equivalent fraction of both fractional numbers with denominator 70
2. For the 1st fraction, since 35 × 2 = 70,
   21/35 = 21 × 2/35 × 2 = 42/70
3. Likewise, for the 2nd fraction, since 70 × 1 = 70,
   28/70 = 28 × 1/70 × 1 = 28/70
4. Add the two like fractions:
   42/70 + 28/70 = 42 + 28/70 = 70/70
5. 70/70 simplified gives 1/1
6. So, 21/35 + 28/70 = 1/1

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