Add 18/20 and 45/63
18/20 + 45/63 is 113/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
18/20 = 18 × 63/20 × 63 = 1134/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
45/63 = 45 × 20/63 × 20 = 900/1260 - Add the two like fractions:
1134/1260 + 900/1260 = 1134 + 900/1260 = 2034/1260 - 2034/1260 simplified gives 113/70
- So, 18/20 + 45/63 = 113/70
In mixed form: 143/70
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