Add 21/70 and 18/54
21/70 + 18/54 is 19/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 54 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 70 × 27 = 1890,
21/70 = 21 × 27/70 × 27 = 567/1890 - Likewise, for the 2nd fraction, since 54 × 35 = 1890,
18/54 = 18 × 35/54 × 35 = 630/1890 - Add the two like fractions:
567/1890 + 630/1890 = 567 + 630/1890 = 1197/1890 - 1197/1890 simplified gives 19/30
- So, 21/70 + 18/54 = 19/30
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