Subtract 25/70 from 81/18
1st number: 4 9/18, 2nd number: 25/70
81/18 - 25/70 is 29/7.
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,
81/18 = 81 × 35/18 × 35 = 2835/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
25/70 = 25 × 9/70 × 9 = 225/630 - Subtract the two like fractions:
2835/630 - 225/630 = 2835 - 225/630 = 2610/630 - After reducing the fraction, the answer is 29/7
- In mixed form: 41/7
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