Add 18/42 and 45/40
1st number: 18/42, 2nd number: 1 5/40
18/42 + 45/40 is 87/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
18/42 = 18 × 20/42 × 20 = 360/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
45/40 = 45 × 21/40 × 21 = 945/840 - Add the two like fractions:
360/840 + 945/840 = 360 + 945/840 = 1305/840 - 1305/840 simplified gives 87/56
- So, 18/42 + 45/40 = 87/56
In mixed form: 131/56
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