Subtract 15/40 from 45/49
45/49 - 15/40 is 213/392.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 40 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 49 × 40 = 1960,
45/49 = 45 × 40/49 × 40 = 1800/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
15/40 = 15 × 49/40 × 49 = 735/1960 - Subtract the two like fractions:
1800/1960 - 735/1960 = 1800 - 735/1960 = 1065/1960 - After reducing the fraction, the answer is 213/392
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/49-15/40 45/49-30/40 45/98-15/40 45/49-15/80 45/49-45/40 45/49-75/40