Answers

Add 21/72 and 42/35

1^st number: 21/72, 2^nd number: 1 7/35

21/72 + 42/35 is 179/120.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 35 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 72 × 35 = 2520,
   21/72 = 21 × 35/72 × 35 = 735/2520
3. Likewise, for the 2nd fraction, since 35 × 72 = 2520,
   42/35 = 42 × 72/35 × 72 = 3024/2520
4. Add the two like fractions:
   735/2520 + 3024/2520 = 735 + 3024/2520 = 3759/2520
5. 3759/2520 simplified gives 179/120
6. So, 21/72 + 42/35 = 179/120
   In mixed form: 159/120

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