Answers

Add 60/84 and 81/40

1^st number: 60/84, 2^nd number: 2 1/40

60/84 + 81/40 is 767/280.

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,
   60/84 = 60 × 10/84 × 10 = 600/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   81/40 = 81 × 21/40 × 21 = 1701/840
4. Add the two like fractions:
   600/840 + 1701/840 = 600 + 1701/840 = 2301/840
5. 2301/840 simplified gives 767/280
6. So, 60/84 + 81/40 = 767/280
   In mixed form: 2207/280

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