Answers

Add 72/7 and 42/90

1^st number: 10 2/7, 2^nd number: 42/90

72/7 + 42/90 is 1129/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 7 × 90 = 630,
   72/7 = 72 × 90/7 × 90 = 6480/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   42/90 = 42 × 7/90 × 7 = 294/630
4. Add the two like fractions:
   6480/630 + 294/630 = 6480 + 294/630 = 6774/630
5. 6774/630 simplified gives 1129/105
6. So, 72/7 + 42/90 = 1129/105
   In mixed form: 1079/105

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