Subtract 60/70 from 72/21
1st number: 3 9/21, 2nd number: 60/70
72/21 - 60/70 is 18/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
72/21 = 72 × 10/21 × 10 = 720/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
60/70 = 60 × 3/70 × 3 = 180/210 - Subtract the two like fractions:
720/210 - 180/210 = 720 - 180/210 = 540/210 - After reducing the fraction, the answer is 18/7
- In mixed form: 24/7
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