Subtract 81/49 from 90/40
1st number: 2 10/40, 2nd number: 1 32/49
90/40 - 81/49 is 117/196.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 49 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 40 × 49 = 1960,
90/40 = 90 × 49/40 × 49 = 4410/1960 - Likewise, for the 2nd fraction, since 49 × 40 = 1960,
81/49 = 81 × 40/49 × 40 = 3240/1960 - Subtract the two like fractions:
4410/1960 - 3240/1960 = 4410 - 3240/1960 = 1170/1960 - After reducing the fraction, the answer is 117/196
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80-81/49 90/40-81/98