Answers

Add 9/21 and 54/60

9/21 + 54/60 is 93/70.

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,
   9/21 = 9 × 20/21 × 20 = 180/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   54/60 = 54 × 7/60 × 7 = 378/420
4. Add the two like fractions:
   180/420 + 378/420 = 180 + 378/420 = 558/420
5. 558/420 simplified gives 93/70
6. So, 9/21 + 54/60 = 93/70
   In mixed form: 123/70

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