Answers

Add 15/84 and 64/40

1^st number: 15/84, 2^nd number: 1 24/40

15/84 + 64/40 is 249/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 84 × 10 = 840,
   15/84 = 15 × 10/84 × 10 = 150/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   64/40 = 64 × 21/40 × 21 = 1344/840
4. Add the two like fractions:
   150/840 + 1344/840 = 150 + 1344/840 = 1494/840
5. 1494/840 simplified gives 249/140
6. So, 15/84 + 64/40 = 249/140
   In mixed form: 1109/140

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