Answers

Add 7/84 and 81/40

1^st number: 7/84, 2^nd number: 2 1/40

7/84 + 81/40 is 253/120.

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,
   7/84 = 7 × 10/84 × 10 = 70/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   81/40 = 81 × 21/40 × 21 = 1701/840
4. Add the two like fractions:
   70/840 + 1701/840 = 70 + 1701/840 = 1771/840
5. 1771/840 simplified gives 253/120
6. So, 7/84 + 81/40 = 253/120
   In mixed form: 213/120

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