Add 10/20 and 21/84
10/20 + 21/84 is 3/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
10/20 = 10 × 21/20 × 21 = 210/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
210/420 + 105/420 = 210 + 105/420 = 315/420 - 315/420 simplified gives 3/4
- So, 10/20 + 21/84 = 3/4
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