Subtract 21/48 from 70/45
1st number: 1 25/45, 2nd number: 21/48
70/45 - 21/48 is 161/144.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 48 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
70/45 = 70 × 16/45 × 16 = 1120/720 - Likewise, for the 2nd fraction, since 48 × 15 = 720,
21/48 = 21 × 15/48 × 15 = 315/720 - Subtract the two like fractions:
1120/720 - 315/720 = 1120 - 315/720 = 805/720 - After reducing the fraction, the answer is 161/144
- In mixed form: 117/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/45-42/48 70/90-21/48 70/45-21/96 70/45-63/48