Add 21/42 and 15/30
21/42 + 15/30 is 1/1.
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,
21/42 = 21 × 5/42 × 5 = 105/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
15/30 = 15 × 7/30 × 7 = 105/210 - Add the two like fractions:
105/210 + 105/210 = 105 + 105/210 = 210/210 - 210/210 simplified gives 1/1
- So, 21/42 + 15/30 = 1/1
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