Subtract 30/80 from 60/42
1st number: 1 18/42, 2nd number: 30/80
60/42 - 30/80 is 59/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
60/42 = 60 × 40/42 × 40 = 2400/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
30/80 = 30 × 21/80 × 21 = 630/1680 - Subtract the two like fractions:
2400/1680 - 630/1680 = 2400 - 630/1680 = 1770/1680 - After reducing the fraction, the answer is 59/56
- In mixed form: 13/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-60/80 60/84-30/80 60/42-90/80