Answers

Add 72/70 and 70/40

1^st number: 1 2/70, 2^nd number: 1 30/40

72/70 + 70/40 is 389/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 70 × 4 = 280,
   72/70 = 72 × 4/70 × 4 = 288/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   70/40 = 70 × 7/40 × 7 = 490/280
4. Add the two like fractions:
   288/280 + 490/280 = 288 + 490/280 = 778/280
5. 778/280 simplified gives 389/140
6. So, 72/70 + 70/40 = 389/140
   In mixed form: 2109/140

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