Add 21/60 and 72/63
1st number: 21/60, 2nd number: 1 9/63
21/60 + 72/63 is 209/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 60 × 21 = 1260,
21/60 = 21 × 21/60 × 21 = 441/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
72/63 = 72 × 20/63 × 20 = 1440/1260 - Add the two like fractions:
441/1260 + 1440/1260 = 441 + 1440/1260 = 1881/1260 - 1881/1260 simplified gives 209/140
- So, 21/60 + 72/63 = 209/140
In mixed form: 169/140
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