Subtract 49/10 from 42/72
1st number: 42/72, 2nd number: 4 9/10
42/72 - 49/10 is -259/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 10 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
42/72 = 42 × 5/72 × 5 = 210/360 - Likewise, for the 2nd fraction, since 10 × 36 = 360,
49/10 = 49 × 36/10 × 36 = 1764/360 - Subtract the two like fractions:
210/360 - 1764/360 = 210 - 1764/360 = -1554/360 - After reducing the fraction, the answer is -259/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/72-49/10 42/72-98/10 42/72-49/20 42/72-49/30 42/72-49/50 42/72-49/70