Add 21/20 and 72/63
1st number: 1 1/20, 2nd number: 1 9/63
21/20 + 72/63 is 307/140.
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,
21/20 = 21 × 63/20 × 63 = 1323/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
72/63 = 72 × 20/63 × 20 = 1440/1260 - Add the two like fractions:
1323/1260 + 1440/1260 = 1323 + 1440/1260 = 2763/1260 - 2763/1260 simplified gives 307/140
- So, 21/20 + 72/63 = 307/140
In mixed form: 227/140
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