Subtract 70/9 from 21/75
1st number: 21/75, 2nd number: 7 7/9
21/75 - 70/9 is -1687/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 9 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 75 × 3 = 225,
21/75 = 21 × 3/75 × 3 = 63/225 - Likewise, for the 2nd fraction, since 9 × 25 = 225,
70/9 = 70 × 25/9 × 25 = 1750/225 - Subtract the two like fractions:
63/225 - 1750/225 = 63 - 1750/225 = -1687/225
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