Add 21/54 and 63/80
21/54 + 63/80 is 847/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 80 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 54 × 40 = 2160,
21/54 = 21 × 40/54 × 40 = 840/2160 - Likewise, for the 2nd fraction, since 80 × 27 = 2160,
63/80 = 63 × 27/80 × 27 = 1701/2160 - Add the two like fractions:
840/2160 + 1701/2160 = 840 + 1701/2160 = 2541/2160 - 2541/2160 simplified gives 847/720
- So, 21/54 + 63/80 = 847/720
In mixed form: 1127/720
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