Subtract 98/70 from 3/8, Solve 3/8 - 1 28/70 as a fraction

Subtract 98/70 from 3/8

1^st number: 3/8, 2^nd number: 1 28/70

3/8 - 98/70 is -41/40.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 70 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 8 × 35 = 280,
3/8 = 3 × 35/8 × 35 = 105/280
Likewise, for the 2nd fraction, since 70 × 4 = 280,
98/70 = 98 × 4/70 × 4 = 392/280
Subtract the two like fractions:
105/280 - 392/280 = 105 - 392/280 = -287/280
After reducing the fraction, the answer is -41/40

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