Add 21/80 and 56/63
21/80 + 56/63 is 829/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 63 is 5040
Next, find the equivalent fraction of both fractional numbers with denominator 5040 - For the 1st fraction, since 80 × 63 = 5040,
21/80 = 21 × 63/80 × 63 = 1323/5040 - Likewise, for the 2nd fraction, since 63 × 80 = 5040,
56/63 = 56 × 80/63 × 80 = 4480/5040 - Add the two like fractions:
1323/5040 + 4480/5040 = 1323 + 4480/5040 = 5803/5040 - 5803/5040 simplified gives 829/720
- So, 21/80 + 56/63 = 829/720
In mixed form: 1109/720
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