Subtract 30/80 from 16/12, Solve 1 4/12

Subtract 30/80 from 16/12

1^st number: 1 4/12, 2^nd number: 30/80

16/12 - 30/80 is 23/24.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 80 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 12 × 20 = 240,
16/12 = 16 × 20/12 × 20 = 320/240
Likewise, for the 2nd fraction, since 80 × 3 = 240,
30/80 = 30 × 3/80 × 3 = 90/240
Subtract the two like fractions:
320/240 - 90/240 = 320 - 90/240 = 230/240
After reducing the fraction, the answer is 23/24

MathStep (Works offline)

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