Answers

Add 15/84 and 7/10

15/84 + 7/10 is 123/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 10 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   15/84 = 15 × 5/84 × 5 = 75/420
3. Likewise, for the 2nd fraction, since 10 × 42 = 420,
   7/10 = 7 × 42/10 × 42 = 294/420
4. Add the two like fractions:
   75/420 + 294/420 = 75 + 294/420 = 369/420
5. 369/420 simplified gives 123/140
6. So, 15/84 + 7/10 = 123/140

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