Add 12/90 and 21/5
1st number: 12/90, 2nd number: 4 1/5
12/90 + 21/5 is 13/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
12/90 = 12 × 1/90 × 1 = 12/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
21/5 = 21 × 18/5 × 18 = 378/90 - Add the two like fractions:
12/90 + 378/90 = 12 + 378/90 = 390/90 - 390/90 simplified gives 13/3
- So, 12/90 + 21/5 = 13/3
In mixed form: 41/3
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