Subtract 7/90 from 45/12
1st number: 3 9/12, 2nd number: 7/90
45/12 - 7/90 is 661/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
45/12 = 45 × 15/12 × 15 = 675/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
7/90 = 7 × 2/90 × 2 = 14/180 - Subtract the two like fractions:
675/180 - 14/180 = 675 - 14/180 = 661/180 - In mixed form: 3121/180
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