Subtract 15/6 from 40/80, Solve 40/80

Subtract 15/6 from 40/80

1^st number: 40/80, 2^nd number: 2 3/6

40/80 - 15/6 is -2/1.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 6 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 80 × 3 = 240,
40/80 = 40 × 3/80 × 3 = 120/240
Likewise, for the 2nd fraction, since 6 × 40 = 240,
15/6 = 15 × 40/6 × 40 = 600/240
Subtract the two like fractions:
120/240 - 600/240 = 120 - 600/240 = -480/240
After reducing the fraction, the answer is -2/1

MathStep (Works offline)

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