Add 20/60 and 5/21
20/60 + 5/21 is 4/7.
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,
20/60 = 20 × 7/60 × 7 = 140/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
5/21 = 5 × 20/21 × 20 = 100/420 - Add the two like fractions:
140/420 + 100/420 = 140 + 100/420 = 240/420 - 240/420 simplified gives 4/7
- So, 20/60 + 5/21 = 4/7
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