Add 3/90 and 21/20
1st number: 3/90, 2nd number: 1 1/20
3/90 + 21/20 is 13/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
3/90 = 3 × 2/90 × 2 = 6/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Add the two like fractions:
6/180 + 189/180 = 6 + 189/180 = 195/180 - 195/180 simplified gives 13/12
- So, 3/90 + 21/20 = 13/12
In mixed form: 11/12
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