Add 81/70 and 70/40
1st number: 1 11/70, 2nd number: 1 30/40
81/70 + 70/40 is 407/140.
Steps for adding fractions
- 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 - For the 1st fraction, since 70 × 4 = 280,
81/70 = 81 × 4/70 × 4 = 324/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
70/40 = 70 × 7/40 × 7 = 490/280 - Add the two like fractions:
324/280 + 490/280 = 324 + 490/280 = 814/280 - 814/280 simplified gives 407/140
- So, 81/70 + 70/40 = 407/140
In mixed form: 2127/140
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