Subtract 7/20 from 84/45
1st number: 1 39/45, 2nd number: 7/20
84/45 - 7/20 is 91/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
84/45 = 84 × 4/45 × 4 = 336/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
7/20 = 7 × 9/20 × 9 = 63/180 - Subtract the two like fractions:
336/180 - 63/180 = 336 - 63/180 = 273/180 - After reducing the fraction, the answer is 91/60
- In mixed form: 131/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45-14/20 84/90-7/20 84/45-7/40 84/45-21/20 84/45-7/60 84/45-35/20 84/45-49/20