Answers

Add 25/84 and 70/40

1^st number: 25/84, 2^nd number: 1 30/40

25/84 + 70/40 is 43/21.

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,
   25/84 = 25 × 10/84 × 10 = 250/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   70/40 = 70 × 21/40 × 21 = 1470/840
4. Add the two like fractions:
   250/840 + 1470/840 = 250 + 1470/840 = 1720/840
5. 1720/840 simplified gives 43/21
6. So, 25/84 + 70/40 = 43/21
   In mixed form: 21/21

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