Subtract 2/7 from 15/90
15/90 - 2/7 is -5/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
2/7 = 2 × 90/7 × 90 = 180/630 - Subtract the two like fractions:
105/630 - 180/630 = 105 - 180/630 = -75/630 - After reducing the fraction, the answer is -5/42
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