Add 12/80 and 20/21
12/80 + 20/21 is 463/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 21 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
12/80 = 12 × 21/80 × 21 = 252/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
20/21 = 20 × 80/21 × 80 = 1600/1680 - Add the two like fractions:
252/1680 + 1600/1680 = 252 + 1600/1680 = 1852/1680 - 1852/1680 simplified gives 463/420
- So, 12/80 + 20/21 = 463/420
In mixed form: 143/420
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