Answers

Add 30/21 and 45/80

1^st number: 1 9/21, 2^nd number: 45/80

30/21 + 45/80 is 223/112.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 21 × 80 = 1680,
   30/21 = 30 × 80/21 × 80 = 2400/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   45/80 = 45 × 21/80 × 21 = 945/1680
4. Add the two like fractions:
   2400/1680 + 945/1680 = 2400 + 945/1680 = 3345/1680
5. 3345/1680 simplified gives 223/112
6. So, 30/21 + 45/80 = 223/112
   In mixed form: 1111/112

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