Subtract 20/70 from 42/9
1st number: 4 6/9, 2nd number: 20/70
42/9 - 20/70 is 92/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 9 × 70 = 630,
42/9 = 42 × 70/9 × 70 = 2940/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630 - Subtract the two like fractions:
2940/630 - 180/630 = 2940 - 180/630 = 2760/630 - After reducing the fraction, the answer is 92/21
- In mixed form: 48/21
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