Add 18/70 and 21/30
18/70 + 21/30 is 67/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
18/70 = 18 × 3/70 × 3 = 54/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
21/30 = 21 × 7/30 × 7 = 147/210 - Add the two like fractions:
54/210 + 147/210 = 54 + 147/210 = 201/210 - 201/210 simplified gives 67/70
- So, 18/70 + 21/30 = 67/70
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