Subtract 20/8 from 70/18
1st number: 3 16/18, 2nd number: 2 4/8
70/18 - 20/8 is 25/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
70/18 = 70 × 4/18 × 4 = 280/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
20/8 = 20 × 9/8 × 9 = 180/72 - Subtract the two like fractions:
280/72 - 180/72 = 280 - 180/72 = 100/72 - After reducing the fraction, the answer is 25/18
- In mixed form: 17/18
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