Subtract 48/45 from 30/40
1st number: 30/40, 2nd number: 1 3/45
30/40 - 48/45 is -19/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
30/40 = 30 × 9/40 × 9 = 270/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
48/45 = 48 × 8/45 × 8 = 384/360 - Subtract the two like fractions:
270/360 - 384/360 = 270 - 384/360 = -114/360 - After reducing the fraction, the answer is -19/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40-48/45 30/40-96/45 30/80-48/45 30/40-48/90 90/40-48/45