Subtract 20/10 from 36/21
1st number: 1 15/21, 2nd number: 2 0/10
36/21 - 20/10 is -2/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
36/21 = 36 × 10/21 × 10 = 360/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
20/10 = 20 × 21/10 × 21 = 420/210 - Subtract the two like fractions:
360/210 - 420/210 = 360 - 420/210 = -60/210 - After reducing the fraction, the answer is -2/7
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