Add 20/42 and 15/30
20/42 + 15/30 is 41/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
15/30 = 15 × 7/30 × 7 = 105/210 - Add the two like fractions:
100/210 + 105/210 = 100 + 105/210 = 205/210 - 205/210 simplified gives 41/42
- So, 20/42 + 15/30 = 41/42
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