Subtract 15/30 from 40/21
1st number: 1 19/21, 2nd number: 15/30
40/21 - 15/30 is 59/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
40/21 = 40 × 10/21 × 10 = 400/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
15/30 = 15 × 7/30 × 7 = 105/210 - Subtract the two like fractions:
400/210 - 105/210 = 400 - 105/210 = 295/210 - After reducing the fraction, the answer is 59/42
- In mixed form: 117/42
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