Add 21/90 and 12/10
1st number: 21/90, 2nd number: 1 2/10
21/90 + 12/10 is 43/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
12/10 = 12 × 9/10 × 9 = 108/90 - Add the two like fractions:
21/90 + 108/90 = 21 + 108/90 = 129/90 - 129/90 simplified gives 43/30
- So, 21/90 + 12/10 = 43/30
In mixed form: 113/30
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