Subtract 63/35 from 9/80, Solve 9/80

Subtract 63/35 from 9/80

1^st number: 9/80, 2^nd number: 1 28/35

9/80 - 63/35 is -27/16.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 35 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 80 × 7 = 560,
9/80 = 9 × 7/80 × 7 = 63/560
Likewise, for the 2nd fraction, since 35 × 16 = 560,
63/35 = 63 × 16/35 × 16 = 1008/560
Subtract the two like fractions:
63/560 - 1008/560 = 63 - 1008/560 = -945/560
After reducing the fraction, the answer is -27/16

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad