Subtract 18/16 from 21/35, Solve 21/35

Subtract 18/16 from 21/35

1^st number: 21/35, 2^nd number: 1 2/16

21/35 - 18/16 is -21/40.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 16 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 35 × 16 = 560,
21/35 = 21 × 16/35 × 16 = 336/560
Likewise, for the 2nd fraction, since 16 × 35 = 560,
18/16 = 18 × 35/16 × 35 = 630/560
Subtract the two like fractions:
336/560 - 630/560 = 336 - 630/560 = -294/560
After reducing the fraction, the answer is -21/40

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