Answers

Add 42/28 and 21/80

1^st number: 1 14/28, 2^nd number: 21/80

42/28 + 21/80 is 141/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 28 × 20 = 560,
   42/28 = 42 × 20/28 × 20 = 840/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   21/80 = 21 × 7/80 × 7 = 147/560
4. Add the two like fractions:
   840/560 + 147/560 = 840 + 147/560 = 987/560
5. 987/560 simplified gives 141/80
6. So, 42/28 + 21/80 = 141/80
   In mixed form: 161/80

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