Answers

Add 45/70 and 30/40

45/70 + 30/40 is 39/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 40 is 280
2. For the 1st fraction, since 70 × 4 = 280,
   45/70 = 45 × 4/70 × 4 = 180/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   30/40 = 30 × 7/40 × 7 = 210/280
4. Add the two fractions:
   180/280 + 210/280 = 180 + 210/280 = 390/280
5. 390/280 simplified gives 39/28
6. So, 45/70 + 30/40 = 39/28
   In mixed form: 111/28

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