Subtract 42/49 from 70/21
1st number: 3 7/21, 2nd number: 42/49
70/21 - 42/49 is 52/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
70/21 = 70 × 7/21 × 7 = 490/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
42/49 = 42 × 3/49 × 3 = 126/147 - Subtract the two like fractions:
490/147 - 126/147 = 490 - 126/147 = 364/147 - After reducing the fraction, the answer is 52/21
- In mixed form: 210/21
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