Add 72/27 and 4/21
1st number: 2 18/27, 2nd number: 4/21
72/27 + 4/21 is 20/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 21 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
72/27 = 72 × 7/27 × 7 = 504/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
4/21 = 4 × 9/21 × 9 = 36/189 - Add the two like fractions:
504/189 + 36/189 = 504 + 36/189 = 540/189 - 540/189 simplified gives 20/7
- So, 72/27 + 4/21 = 20/7
In mixed form: 26/7
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