Add 28/42 and 40/80
28/42 + 40/80 is 7/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
28/42 = 28 × 40/42 × 40 = 1120/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
40/80 = 40 × 21/80 × 21 = 840/1680 - Add the two like fractions:
1120/1680 + 840/1680 = 1120 + 840/1680 = 1960/1680 - 1960/1680 simplified gives 7/6
- So, 28/42 + 40/80 = 7/6
In mixed form: 11/6
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