Subtract 40/42 from 48/45
1st number: 1 3/45, 2nd number: 40/42
48/45 - 40/42 is 4/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
48/45 = 48 × 14/45 × 14 = 672/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
40/42 = 40 × 15/42 × 15 = 600/630 - Subtract the two like fractions:
672/630 - 600/630 = 672 - 600/630 = 72/630 - After reducing the fraction, the answer is 4/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/45-40/42 48/45-80/42 48/90-40/42 48/45-40/84