Answers

Add 8/60 and 15/21

8/60 + 15/21 is 89/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 21 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 60 × 7 = 420,
   8/60 = 8 × 7/60 × 7 = 56/420
3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
   15/21 = 15 × 20/21 × 20 = 300/420
4. Add the two like fractions:
   56/420 + 300/420 = 56 + 300/420 = 356/420
5. 356/420 simplified gives 89/105
6. So, 8/60 + 15/21 = 89/105

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