Subtract 90/70 from 4/16, Solve 4/16

Subtract 90/70 from 4/16

1^st number: 4/16, 2^nd number: 1 20/70

4/16 - 90/70 is -29/28.

Find the least common denominator or LCM of the two denominators:
LCM of 16 and 70 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 16 × 35 = 560,
4/16 = 4 × 35/16 × 35 = 140/560
Likewise, for the 2nd fraction, since 70 × 8 = 560,
90/70 = 90 × 8/70 × 8 = 720/560
Subtract the two like fractions:
140/560 - 720/560 = 140 - 720/560 = -580/560
After reducing the fraction, the answer is -29/28

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