Subtract 21/90 from 70/15
1st number: 4 10/15, 2nd number: 21/90
70/15 - 21/90 is 133/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
70/15 = 70 × 6/15 × 6 = 420/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Subtract the two like fractions:
420/90 - 21/90 = 420 - 21/90 = 399/90 - After reducing the fraction, the answer is 133/30
- In mixed form: 413/30
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