Add 28/40 and 81/84
28/40 + 81/84 is 233/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
28/40 = 28 × 21/40 × 21 = 588/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
81/84 = 81 × 10/84 × 10 = 810/840 - Add the two like fractions:
588/840 + 810/840 = 588 + 810/840 = 1398/840 - 1398/840 simplified gives 233/140
- So, 28/40 + 81/84 = 233/140
In mixed form: 193/140
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