Add 21/70 and 12/27
21/70 + 12/27 is 67/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 27 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 27 × 70 = 1890,
12/27 = 12 × 70/27 × 70 = 840/1890 - Add the two like fractions:
567/1890 + 840/1890 = 567 + 840/1890 = 1407/1890 - 1407/1890 simplified gives 67/90
- So, 21/70 + 12/27 = 67/90
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