Answers

Add 45/90 and 90/21

1^st number: 45/90, 2^nd number: 4 6/21

45/90 + 90/21 is 67/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 21 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   45/90 = 45 × 7/90 × 7 = 315/630
3. Likewise, for the 2nd fraction, since 21 × 30 = 630,
   90/21 = 90 × 30/21 × 30 = 2700/630
4. Add the two like fractions:
   315/630 + 2700/630 = 315 + 2700/630 = 3015/630
5. 3015/630 simplified gives 67/14
6. So, 45/90 + 90/21 = 67/14
   In mixed form: 411/14

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