Add 36/80 and 12/21
36/80 + 12/21 is 143/140.
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,
36/80 = 36 × 21/80 × 21 = 756/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
12/21 = 12 × 80/21 × 80 = 960/1680 - Add the two like fractions:
756/1680 + 960/1680 = 756 + 960/1680 = 1716/1680 - 1716/1680 simplified gives 143/140
- So, 36/80 + 12/21 = 143/140
In mixed form: 13/140
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