Add 18/40 and 3/42
18/40 + 3/42 is 73/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
18/40 = 18 × 21/40 × 21 = 378/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
3/42 = 3 × 20/42 × 20 = 60/840 - Add the two like fractions:
378/840 + 60/840 = 378 + 60/840 = 438/840 - 438/840 simplified gives 73/140
- So, 18/40 + 3/42 = 73/140
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