Subtract 25/21 from 70/4
1st number: 17 2/4, 2nd number: 1 4/21
70/4 - 25/21 is 685/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
70/4 = 70 × 21/4 × 21 = 1470/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
25/21 = 25 × 4/21 × 4 = 100/84 - Subtract the two like fractions:
1470/84 - 100/84 = 1470 - 100/84 = 1370/84 - After reducing the fraction, the answer is 685/42
- In mixed form: 1613/42
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