Add 21/10 and 18/45
1st number: 2 1/10, 2nd number: 18/45
21/10 + 18/45 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
21/10 = 21 × 9/10 × 9 = 189/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
18/45 = 18 × 2/45 × 2 = 36/90 - Add the two like fractions:
189/90 + 36/90 = 189 + 36/90 = 225/90 - 225/90 simplified gives 5/2
- So, 21/10 + 18/45 = 5/2
In mixed form: 21/2
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