Subtract 60/8 from 21/30
1st number: 21/30, 2nd number: 7 4/8
21/30 - 60/8 is -34/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
21/30 = 21 × 4/30 × 4 = 84/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
60/8 = 60 × 15/8 × 15 = 900/120 - Subtract the two like fractions:
84/120 - 900/120 = 84 - 900/120 = -816/120 - After reducing the fraction, the answer is -34/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30-60/8 21/60-60/8 21/30-60/16 63/30-60/8 21/90-60/8 21/30-60/24 21/30-60/40 21/30-60/56