Subtract 48/81 from 49/40
1st number: 1 9/40, 2nd number: 48/81
49/40 - 48/81 is 683/1080.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
49/40 = 49 × 81/40 × 81 = 3969/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
48/81 = 48 × 40/81 × 40 = 1920/3240 - Subtract the two like fractions:
3969/3240 - 1920/3240 = 3969 - 1920/3240 = 2049/3240 - After reducing the fraction, the answer is 683/1080
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/40-48/81 49/40-96/81 49/80-48/81