Add 15/27 and 21/70
15/27 + 21/70 is 77/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 70 is 1890
Next, find the equivalent fraction of both fractional numbers with denominator 1890 - For the 1st fraction, since 27 × 70 = 1890,
15/27 = 15 × 70/27 × 70 = 1050/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
21/70 = 21 × 27/70 × 27 = 567/1890 - Add the two like fractions:
1050/1890 + 567/1890 = 1050 + 567/1890 = 1617/1890 - 1617/1890 simplified gives 77/90
- So, 15/27 + 21/70 = 77/90
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