Add 2/20 and 12/21
2/20 + 12/21 is 47/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
2/20 = 2 × 21/20 × 21 = 42/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
12/21 = 12 × 20/21 × 20 = 240/420 - Add the two like fractions:
42/420 + 240/420 = 42 + 240/420 = 282/420 - 282/420 simplified gives 47/70
- So, 2/20 + 12/21 = 47/70
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