Subtract 21/16 from 90/30
1st number: 3 0/30, 2nd number: 1 5/16
90/30 - 21/16 is 27/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
90/30 = 90 × 8/30 × 8 = 720/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
21/16 = 21 × 15/16 × 15 = 315/240 - Subtract the two like fractions:
720/240 - 315/240 = 720 - 315/240 = 405/240 - After reducing the fraction, the answer is 27/16
- In mixed form: 111/16
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