Answers

Add 15/84 and 63/40

1^st number: 15/84, 2^nd number: 1 23/40

15/84 + 63/40 is 491/280.

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,
   63/40 = 63 × 21/40 × 21 = 1323/840
4. Add the two like fractions:
   150/840 + 1323/840 = 150 + 1323/840 = 1473/840
5. 1473/840 simplified gives 491/280
6. So, 15/84 + 63/40 = 491/280
   In mixed form: 1211/280

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