Add 3/21 and 75/80
3/21 + 75/80 is 121/112.
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,
3/21 = 3 × 80/21 × 80 = 240/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
75/80 = 75 × 21/80 × 21 = 1575/1680 - Add the two like fractions:
240/1680 + 1575/1680 = 240 + 1575/1680 = 1815/1680 - 1815/1680 simplified gives 121/112
- So, 3/21 + 75/80 = 121/112
In mixed form: 19/112
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