Subtract 21/30 from 28/18
1st number: 1 10/18, 2nd number: 21/30
28/18 - 21/30 is 77/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
21/30 = 21 × 3/30 × 3 = 63/90 - Subtract the two like fractions:
140/90 - 63/90 = 140 - 63/90 = 77/90
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