Answers

Add 90/70 and 45/40

1^st number: 1 20/70, 2^nd number: 1 5/40

90/70 + 45/40 is 135/56.

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,
   90/70 = 90 × 4/70 × 4 = 360/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   45/40 = 45 × 7/40 × 7 = 315/280
4. Add the two like fractions:
   360/280 + 315/280 = 360 + 315/280 = 675/280
5. 675/280 simplified gives 135/56
6. So, 90/70 + 45/40 = 135/56
   In mixed form: 223/56

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