Answers

Add 15/70 and 72/40

1^st number: 15/70, 2^nd number: 1 32/40

15/70 + 72/40 is 141/70.

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,
   15/70 = 15 × 4/70 × 4 = 60/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   72/40 = 72 × 7/40 × 7 = 504/280
4. Add the two like fractions:
   60/280 + 504/280 = 60 + 504/280 = 564/280
5. 564/280 simplified gives 141/70
6. So, 15/70 + 72/40 = 141/70
   In mixed form: 21/70

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