Add 28/42 and 18/40
28/42 + 18/40 is 67/60.
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,
28/42 = 28 × 20/42 × 20 = 560/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
18/40 = 18 × 21/40 × 21 = 378/840 - Add the two like fractions:
560/840 + 378/840 = 560 + 378/840 = 938/840 - 938/840 simplified gives 67/60
- So, 28/42 + 18/40 = 67/60
In mixed form: 17/60
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