Add 12/40 and 81/90
12/40 + 81/90 is 6/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
12/40 = 12 × 9/40 × 9 = 108/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
81/90 = 81 × 4/90 × 4 = 324/360 - Add the two like fractions:
108/360 + 324/360 = 108 + 324/360 = 432/360 - 432/360 simplified gives 6/5
- So, 12/40 + 81/90 = 6/5
In mixed form: 11/5
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