Subtract 45/16 from 42/70, Solve 42/70

Subtract 45/16 from 42/70

1^st number: 42/70, 2^nd number: 2 13/16

42/70 - 45/16 is -177/80.

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

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 70 × 8 = 560,
42/70 = 42 × 8/70 × 8 = 336/560
Likewise, for the 2nd fraction, since 16 × 35 = 560,
45/16 = 45 × 35/16 × 35 = 1575/560
Subtract the two like fractions:
336/560 - 1575/560 = 336 - 1575/560 = -1239/560
After reducing the fraction, the answer is -177/80

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