Add 21/84 and 12/60
21/84 + 12/60 is 9/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
12/60 = 12 × 7/60 × 7 = 84/420 - Add the two like fractions:
105/420 + 84/420 = 105 + 84/420 = 189/420 - 189/420 simplified gives 9/20
- So, 21/84 + 12/60 = 9/20
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