Subtract 30/21 from 2/20
1st number: 2/20, 2nd number: 1 9/21
2/20 - 30/21 is -93/70.
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,
2/20 = 2 × 21/20 × 21 = 42/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
30/21 = 30 × 20/21 × 20 = 600/420 - Subtract the two like fractions:
42/420 - 600/420 = 42 - 600/420 = -558/420 - After reducing the fraction, the answer is -93/70
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