Add 12/20 and 40/90
12/20 + 40/90 is 47/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
12/20 = 12 × 9/20 × 9 = 108/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
40/90 = 40 × 2/90 × 2 = 80/180 - Add the two like fractions:
108/180 + 80/180 = 108 + 80/180 = 188/180 - 188/180 simplified gives 47/45
- So, 12/20 + 40/90 = 47/45
In mixed form: 12/45
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