Subtract 45/7 from 30/8
1st number: 3 6/8, 2nd number: 6 3/7
30/8 - 45/7 is -75/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
30/8 = 30 × 7/8 × 7 = 210/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
45/7 = 45 × 8/7 × 8 = 360/56 - Subtract the two like fractions:
210/56 - 360/56 = 210 - 360/56 = -150/56 - After reducing the fraction, the answer is -75/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8-45/7 30/8-90/7 30/16-45/7 30/8-45/14 90/8-45/7 30/24-45/7 30/8-45/21 30/40-45/7 30/8-45/35 30/56-45/7 30/8-45/49