Add 3/15 and 40/42
3/15 + 40/42 is 121/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
3/15 = 3 × 14/15 × 14 = 42/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210 - Add the two like fractions:
42/210 + 200/210 = 42 + 200/210 = 242/210 - 242/210 simplified gives 121/105
- So, 3/15 + 40/42 = 121/105
In mixed form: 116/105
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