Add 45/7 and 18/20
1st number: 6 3/7, 2nd number: 18/20
45/7 + 18/20 is 513/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
45/7 = 45 × 20/7 × 20 = 900/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Add the two like fractions:
900/140 + 126/140 = 900 + 126/140 = 1026/140 - 1026/140 simplified gives 513/70
- So, 45/7 + 18/20 = 513/70
In mixed form: 723/70
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