Subtract 20/70 from 45/18
1st number: 2 9/18, 2nd number: 20/70
45/18 - 20/70 is 31/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
45/18 = 45 × 35/18 × 35 = 1575/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630 - Subtract the two like fractions:
1575/630 - 180/630 = 1575 - 180/630 = 1395/630 - After reducing the fraction, the answer is 31/14
- In mixed form: 23/14
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