Subtract 21/80 from 70/75
70/75 - 21/80 is 161/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 80 is 1200
Next, find the equivalent fraction of both fractional numbers with denominator 1200 - For the 1st fraction, since 75 × 16 = 1200,
70/75 = 70 × 16/75 × 16 = 1120/1200 - Likewise, for the 2nd fraction, since 80 × 15 = 1200,
21/80 = 21 × 15/80 × 15 = 315/1200 - Subtract the two like fractions:
1120/1200 - 315/1200 = 1120 - 315/1200 = 805/1200 - After reducing the fraction, the answer is 161/240
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