Add 42/80 and 21/63
42/80 + 21/63 is 103/120.
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,
42/80 = 42 × 63/80 × 63 = 2646/5040 - Likewise, for the 2nd fraction, since 63 × 80 = 5040,
21/63 = 21 × 80/63 × 80 = 1680/5040 - Add the two like fractions:
2646/5040 + 1680/5040 = 2646 + 1680/5040 = 4326/5040 - 4326/5040 simplified gives 103/120
- So, 42/80 + 21/63 = 103/120
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