Add 81/70 and 18/40
1st number: 1 11/70, 2nd number: 18/40
81/70 + 18/40 is 45/28.
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,
18/40 = 18 × 7/40 × 7 = 126/280 - Add the two like fractions:
324/280 + 126/280 = 324 + 126/280 = 450/280 - 450/280 simplified gives 45/28
- So, 81/70 + 18/40 = 45/28
In mixed form: 117/28
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