Subtract 30/90 from 49/72
49/72 - 30/90 is 25/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
49/72 = 49 × 5/72 × 5 = 245/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
30/90 = 30 × 4/90 × 4 = 120/360 - Subtract the two like fractions:
245/360 - 120/360 = 245 - 120/360 = 125/360 - After reducing the fraction, the answer is 25/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/72-30/90 49/72-60/90