Add 2/21 and 40/84
2/21 + 40/84 is 4/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
2/21 = 2 × 4/21 × 4 = 8/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
40/84 = 40 × 1/84 × 1 = 40/84 - Add the two like fractions:
8/84 + 40/84 = 8 + 40/84 = 48/84 - 48/84 simplified gives 4/7
- So, 2/21 + 40/84 = 4/7
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