Answers

Add 40/21 and 80/60

1^st number: 1 19/21, 2^nd number: 1 20/60

40/21 + 80/60 is 68/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 21 × 20 = 420,
   40/21 = 40 × 20/21 × 20 = 800/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   80/60 = 80 × 7/60 × 7 = 560/420
4. Add the two like fractions:
   800/420 + 560/420 = 800 + 560/420 = 1360/420
5. 1360/420 simplified gives 68/21
6. So, 40/21 + 80/60 = 68/21
   In mixed form: 35/21

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