Answers

Add 28/70 and 54/40

1^st number: 28/70, 2^nd number: 1 14/40

28/70 + 54/40 is 7/4.

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,
   28/70 = 28 × 4/70 × 4 = 112/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   54/40 = 54 × 7/40 × 7 = 378/280
4. Add the two like fractions:
   112/280 + 378/280 = 112 + 378/280 = 490/280
5. 490/280 simplified gives 7/4
6. So, 28/70 + 54/40 = 7/4
   In mixed form: 13/4

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