Subtract 30/21 from 49/20
1st number: 2 9/20, 2nd number: 1 9/21
49/20 - 30/21 is 143/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
49/20 = 49 × 21/20 × 21 = 1029/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
30/21 = 30 × 20/21 × 20 = 600/420 - Subtract the two like fractions:
1029/420 - 600/420 = 1029 - 600/420 = 429/420 - After reducing the fraction, the answer is 143/140
- In mixed form: 13/140
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