Subtract 35/16 from 40/70, Solve 40/70

Subtract 35/16 from 40/70

1^st number: 40/70, 2^nd number: 2 3/16

40/70 - 35/16 is -181/112.

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,
40/70 = 40 × 8/70 × 8 = 320/560
Likewise, for the 2nd fraction, since 16 × 35 = 560,
35/16 = 35 × 35/16 × 35 = 1225/560
Subtract the two like fractions:
320/560 - 1225/560 = 320 - 1225/560 = -905/560
After reducing the fraction, the answer is -181/112

MathStep (Works offline)

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