Subtract 72/32 from 70/90
1st number: 70/90, 2nd number: 2 8/32
70/90 - 72/32 is -53/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 32 is 1440
Next, find the equivalent fraction of both fractional numbers with denominator 1440 - For the 1st fraction, since 90 × 16 = 1440,
70/90 = 70 × 16/90 × 16 = 1120/1440 - Likewise, for the 2nd fraction, since 32 × 45 = 1440,
72/32 = 72 × 45/32 × 45 = 3240/1440 - Subtract the two like fractions:
1120/1440 - 3240/1440 = 1120 - 3240/1440 = -2120/1440 - After reducing the fraction, the answer is -53/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90-72/64 70/90-72/96