Add 18/40 and 81/70
1st number: 18/40, 2nd number: 1 11/70
18/40 + 81/70 is 45/28.
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,
18/40 = 18 × 7/40 × 7 = 126/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
81/70 = 81 × 4/70 × 4 = 324/280 - Add the two like fractions:
126/280 + 324/280 = 126 + 324/280 = 450/280 - 450/280 simplified gives 45/28
- So, 18/40 + 81/70 = 45/28
In mixed form: 117/28
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