Add 12/21 and 54/80
12/21 + 54/80 is 349/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
12/21 = 12 × 80/21 × 80 = 960/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
54/80 = 54 × 21/80 × 21 = 1134/1680 - Add the two like fractions:
960/1680 + 1134/1680 = 960 + 1134/1680 = 2094/1680 - 2094/1680 simplified gives 349/280
- So, 12/21 + 54/80 = 349/280
In mixed form: 169/280
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