Subtract 9/40 from 42/35
1st number: 1 7/35, 2nd number: 9/40
42/35 - 9/40 is 39/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 35 × 8 = 280,
42/35 = 42 × 8/35 × 8 = 336/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
9/40 = 9 × 7/40 × 7 = 63/280 - Subtract the two like fractions:
336/280 - 63/280 = 336 - 63/280 = 273/280 - After reducing the fraction, the answer is 39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/35-9/40 42/35-18/40 42/70-9/40 42/35-9/80 42/35-27/40 42/35-45/40 42/35-63/40