Add 42/80 and 75/42
1st number: 42/80, 2nd number: 1 33/42
42/80 + 75/42 is 647/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
42/80 = 42 × 21/80 × 21 = 882/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
75/42 = 75 × 40/42 × 40 = 3000/1680 - Add the two like fractions:
882/1680 + 3000/1680 = 882 + 3000/1680 = 3882/1680 - 3882/1680 simplified gives 647/280
- So, 42/80 + 75/42 = 647/280
In mixed form: 287/280
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