Add 20/21 and 20/60
20/21 + 20/60 is 9/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
20/21 = 20 × 20/21 × 20 = 400/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
20/60 = 20 × 7/60 × 7 = 140/420 - Add the two like fractions:
400/420 + 140/420 = 400 + 140/420 = 540/420 - 540/420 simplified gives 9/7
- So, 20/21 + 20/60 = 9/7
In mixed form: 12/7
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