Subtract 40/72 from 21/5
1st number: 4 1/5, 2nd number: 40/72
21/5 - 40/72 is 164/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 5 × 72 = 360,
21/5 = 21 × 72/5 × 72 = 1512/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
40/72 = 40 × 5/72 × 5 = 200/360 - Subtract the two like fractions:
1512/360 - 200/360 = 1512 - 200/360 = 1312/360 - After reducing the fraction, the answer is 164/45
- In mixed form: 329/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5-40/72 21/5-80/72 21/10-40/72 63/5-40/72 21/15-40/72 21/25-40/72 21/35-40/72