Add 90/27 and 9/21
1st number: 3 9/27, 2nd number: 9/21
90/27 + 9/21 is 79/21.
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,
90/27 = 90 × 7/27 × 7 = 630/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
9/21 = 9 × 9/21 × 9 = 81/189 - Add the two like fractions:
630/189 + 81/189 = 630 + 81/189 = 711/189 - 711/189 simplified gives 79/21
- So, 90/27 + 9/21 = 79/21
In mixed form: 316/21
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