Answers

Add 72/70 and 42/40

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

72/70 + 42/40 is 291/140.

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,
   42/40 = 42 × 7/40 × 7 = 294/280
4. Add the two like fractions:
   288/280 + 294/280 = 288 + 294/280 = 582/280
5. 582/280 simplified gives 291/140
6. So, 72/70 + 42/40 = 291/140
   In mixed form: 211/140

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