Subtract 18/75 from 21/20
1st number: 1 1/20, 2nd number: 18/75
21/20 - 18/75 is 81/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 75 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 20 × 15 = 300,
21/20 = 21 × 15/20 × 15 = 315/300 - Likewise, for the 2nd fraction, since 75 × 4 = 300,
18/75 = 18 × 4/75 × 4 = 72/300 - Subtract the two like fractions:
315/300 - 72/300 = 315 - 72/300 = 243/300 - After reducing the fraction, the answer is 81/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20-18/75 21/20-36/75 21/40-18/75 63/20-18/75 21/20-54/75 21/60-18/75 21/20-90/75