Subtract 70/45 from 21/18
1st number: 1 3/18, 2nd number: 1 25/45
21/18 - 70/45 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
70/45 = 70 × 2/45 × 2 = 140/90 - Subtract the two like fractions:
105/90 - 140/90 = 105 - 140/90 = -35/90 - After reducing the fraction, the answer is -7/18
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