Subtract 21/10 from 70/75
1st number: 70/75, 2nd number: 2 1/10
70/75 - 21/10 is -7/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 10 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 75 × 2 = 150,
70/75 = 70 × 2/75 × 2 = 140/150 - Likewise, for the 2nd fraction, since 10 × 15 = 150,
21/10 = 21 × 15/10 × 15 = 315/150 - Subtract the two like fractions:
140/150 - 315/150 = 140 - 315/150 = -175/150 - After reducing the fraction, the answer is -7/6
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