Subtract 15/40 from 90/63
1st number: 1 27/63, 2nd number: 15/40
90/63 - 15/40 is 59/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 40 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 63 × 40 = 2520,
90/63 = 90 × 40/63 × 40 = 3600/2520 - Likewise, for the 2nd fraction, since 40 × 63 = 2520,
15/40 = 15 × 63/40 × 63 = 945/2520 - Subtract the two like fractions:
3600/2520 - 945/2520 = 3600 - 945/2520 = 2655/2520 - After reducing the fraction, the answer is 59/56
- In mixed form: 13/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/63-30/40 90/63-15/80 90/63-45/40 90/63-75/40