Add 21/81 and 12/7
1st number: 21/81, 2nd number: 1 5/7
21/81 + 12/7 is 373/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 7 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
21/81 = 21 × 7/81 × 7 = 147/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
12/7 = 12 × 81/7 × 81 = 972/567 - Add the two like fractions:
147/567 + 972/567 = 147 + 972/567 = 1119/567 - 1119/567 simplified gives 373/189
- So, 21/81 + 12/7 = 373/189
In mixed form: 1184/189
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