Subtract 28/54 from 75/70, Solve 1 5/70

Subtract 28/54 from 75/70

1^st number: 1 5/70, 2^nd number: 28/54

75/70 - 28/54 is 209/378.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 54 is 1890

Next, find the equivalent fraction of both fractional numbers with denominator 1890
For the 1st fraction, since 70 × 27 = 1890,
75/70 = 75 × 27/70 × 27 = 2025/1890
Likewise, for the 2nd fraction, since 54 × 35 = 1890,
28/54 = 28 × 35/54 × 35 = 980/1890
Subtract the two like fractions:
2025/1890 - 980/1890 = 2025 - 980/1890 = 1045/1890
After reducing the fraction, the answer is 209/378

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