Subtract 18/70 from 63/20
1st number: 3 3/20, 2nd number: 18/70
63/20 - 18/70 is 81/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
63/20 = 63 × 7/20 × 7 = 441/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
18/70 = 18 × 2/70 × 2 = 36/140 - Subtract the two like fractions:
441/140 - 36/140 = 441 - 36/140 = 405/140 - After reducing the fraction, the answer is 81/28
- In mixed form: 225/28
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