Subtract 28/42 from 42/40
1st number: 1 2/40, 2nd number: 28/42
42/40 - 28/42 is 23/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
42/40 = 42 × 21/40 × 21 = 882/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
28/42 = 28 × 20/42 × 20 = 560/840 - Subtract the two like fractions:
882/840 - 560/840 = 882 - 560/840 = 322/840 - After reducing the fraction, the answer is 23/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40-28/42 42/40-56/42 42/80-28/42 42/40-28/84 42/40-84/42