Add 4/5 and 15/42
4/5 + 15/42 is 81/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
4/5 = 4 × 42/5 × 42 = 168/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Add the two like fractions:
168/210 + 75/210 = 168 + 75/210 = 243/210 - 243/210 simplified gives 81/70
- So, 4/5 + 15/42 = 81/70
In mixed form: 111/70
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