Subtract 3/54 from 21/35, Solve 21/35

Subtract 3/54 from 21/35

21/35 - 3/54 is 49/90.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 54 is 1890

Next, find the equivalent fraction of both fractional numbers with denominator 1890
For the 1st fraction, since 35 × 54 = 1890,
21/35 = 21 × 54/35 × 54 = 1134/1890
Likewise, for the 2nd fraction, since 54 × 35 = 1890,
3/54 = 3 × 35/54 × 35 = 105/1890
Subtract the two like fractions:
1134/1890 - 105/1890 = 1134 - 105/1890 = 1029/1890
After reducing the fraction, the answer is 49/90

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