Subtract 21/10 from 30/60
1st number: 30/60, 2nd number: 2 1/10
30/60 - 21/10 is -8/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 10 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
30/60 = 30 × 1/60 × 1 = 30/60 - Likewise, for the 2nd fraction, since 10 × 6 = 60,
21/10 = 21 × 6/10 × 6 = 126/60 - Subtract the two like fractions:
30/60 - 126/60 = 30 - 126/60 = -96/60 - After reducing the fraction, the answer is -8/5
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