Answers

Add 28/21 and 25/80

1^st number: 1 7/21, 2^nd number: 25/80

28/21 + 25/80 is 79/48.

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,
   28/21 = 28 × 80/21 × 80 = 2240/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   25/80 = 25 × 21/80 × 21 = 525/1680
4. Add the two like fractions:
   2240/1680 + 525/1680 = 2240 + 525/1680 = 2765/1680
5. 2765/1680 simplified gives 79/48
6. So, 28/21 + 25/80 = 79/48
   In mixed form: 131/48

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