Subtract 30/48 from 90/80, Solve 1 10/80

Subtract 30/48 from 90/80

1^st number: 1 10/80, 2^nd number: 30/48

90/80 - 30/48 is 1/2.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 48 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 80 × 3 = 240,
90/80 = 90 × 3/80 × 3 = 270/240
Likewise, for the 2nd fraction, since 48 × 5 = 240,
30/48 = 30 × 5/48 × 5 = 150/240
Subtract the two like fractions:
270/240 - 150/240 = 270 - 150/240 = 120/240
After reducing the fraction, the answer is 1/2

MathStep (Works offline)

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