Subtract 30/42 from 3/5
3/5 - 30/42 is -4/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
3/5 = 3 × 42/5 × 42 = 126/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
30/42 = 30 × 5/42 × 5 = 150/210 - Subtract the two like fractions:
126/210 - 150/210 = 126 - 150/210 = -24/210 - After reducing the fraction, the answer is -4/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/5-30/42 3/5-60/42 3/10-30/42 3/5-30/84 9/5-30/42 3/5-90/42 3/15-30/42 15/5-30/42 3/25-30/42 21/5-30/42 3/35-30/42