Subtract 98/90 from 21/20
1st number: 1 1/20, 2nd number: 1 8/90
21/20 - 98/90 is -7/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
98/90 = 98 × 2/90 × 2 = 196/180 - Subtract the two like fractions:
189/180 - 196/180 = 189 - 196/180 = -7/180
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