Subtract 21/70 from 42/20
1st number: 2 2/20, 2nd number: 21/70
42/20 - 21/70 is 9/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
21/70 = 21 × 2/70 × 2 = 42/140 - Subtract the two like fractions:
294/140 - 42/140 = 294 - 42/140 = 252/140 - After reducing the fraction, the answer is 9/5
- In mixed form: 14/5
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