Subtract 21/70 from 25/18
1st number: 1 7/18, 2nd number: 21/70
25/18 - 21/70 is 49/45.
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,
25/18 = 25 × 35/18 × 35 = 875/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
21/70 = 21 × 9/70 × 9 = 189/630 - Subtract the two like fractions:
875/630 - 189/630 = 875 - 189/630 = 686/630 - After reducing the fraction, the answer is 49/45
- In mixed form: 14/45
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