Add 1/21 and 21/80
1/21 + 21/80 is 521/1680.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
1/21 = 1 × 80/21 × 80 = 80/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
21/80 = 21 × 21/80 × 21 = 441/1680 - Add the two like fractions:
80/1680 + 441/1680 = 80 + 441/1680 = 521/1680 - So, 1/21 + 21/80 = 521/1680
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