Add 72/27 and 90/70
1st number: 2 18/27, 2nd number: 1 20/70
72/27 + 90/70 is 83/21.
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,
72/27 = 72 × 70/27 × 70 = 5040/1890 - Likewise, for the 2nd fraction, since 70 × 27 = 1890,
90/70 = 90 × 27/70 × 27 = 2430/1890 - Add the two like fractions:
5040/1890 + 2430/1890 = 5040 + 2430/1890 = 7470/1890 - 7470/1890 simplified gives 83/21
- So, 72/27 + 90/70 = 83/21
In mixed form: 320/21
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