Subtract 42/49 from 70/90
70/90 - 42/49 is -5/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 49 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 90 × 49 = 4410,
70/90 = 70 × 49/90 × 49 = 3430/4410 - Likewise, for the 2nd fraction, since 49 × 90 = 4410,
42/49 = 42 × 90/49 × 90 = 3780/4410 - Subtract the two like fractions:
3430/4410 - 3780/4410 = 3430 - 3780/4410 = -350/4410 - After reducing the fraction, the answer is -5/63
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