Subtract 15/49 from 42/40
1st number: 1 2/40, 2nd number: 15/49
42/40 - 15/49 is 729/980.
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,
42/40 = 42 × 49/40 × 49 = 2058/1960 - Likewise, for the 2nd fraction, since 49 × 40 = 1960,
15/49 = 15 × 40/49 × 40 = 600/1960 - Subtract the two like fractions:
2058/1960 - 600/1960 = 2058 - 600/1960 = 1458/1960 - After reducing the fraction, the answer is 729/980
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40-15/49 42/40-30/49 42/80-15/49 42/40-15/98 42/40-45/49 42/40-75/49