Add 21/42 and 3/30
21/42 + 3/30 is 3/5.
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,
3/30 = 3 × 7/30 × 7 = 21/210 - Add the two like fractions:
105/210 + 21/210 = 105 + 21/210 = 126/210 - 126/210 simplified gives 3/5
- So, 21/42 + 3/30 = 3/5
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