Add 28/56 and 81/90
28/56 + 81/90 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
28/56 = 28 × 45/56 × 45 = 1260/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
81/90 = 81 × 28/90 × 28 = 2268/2520 - Add the two like fractions:
1260/2520 + 2268/2520 = 1260 + 2268/2520 = 3528/2520 - 3528/2520 simplified gives 7/5
- So, 28/56 + 81/90 = 7/5
In mixed form: 12/5
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