Add 21/60 and 63/21
1st number: 21/60, 2nd number: 3 0/21
21/60 + 63/21 is 67/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
21/60 = 21 × 7/60 × 7 = 147/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
63/21 = 63 × 20/21 × 20 = 1260/420 - Add the two like fractions:
147/420 + 1260/420 = 147 + 1260/420 = 1407/420 - 1407/420 simplified gives 67/20
- So, 21/60 + 63/21 = 67/20
In mixed form: 37/20
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