Add 28/40 and 81/45
1st number: 28/40, 2nd number: 1 36/45
28/40 + 81/45 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
81/45 = 81 × 8/45 × 8 = 648/360 - Add the two like fractions:
252/360 + 648/360 = 252 + 648/360 = 900/360 - 900/360 simplified gives 5/2
- So, 28/40 + 81/45 = 5/2
In mixed form: 21/2
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