Add 70/40 and 80/70
1st number: 1 30/40, 2nd number: 1 10/70
70/40 + 80/70 is 81/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
70/40 = 70 × 7/40 × 7 = 490/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
80/70 = 80 × 4/70 × 4 = 320/280 - Add the two like fractions:
490/280 + 320/280 = 490 + 320/280 = 810/280 - 810/280 simplified gives 81/28
- So, 70/40 + 80/70 = 81/28
In mixed form: 225/28
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Related: 70/80+80/70