Add 20/54 and 45/21
1st number: 20/54, 2nd number: 2 3/21
20/54 + 45/21 is 475/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
20/54 = 20 × 7/54 × 7 = 140/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
45/21 = 45 × 18/21 × 18 = 810/378 - Add the two like fractions:
140/378 + 810/378 = 140 + 810/378 = 950/378 - 950/378 simplified gives 475/189
- So, 20/54 + 45/21 = 475/189
In mixed form: 297/189
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