Subtract 1/60 from 42/80
42/80 - 1/60 is 61/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 60 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
42/80 = 42 × 3/80 × 3 = 126/240 - Likewise, for the 2nd fraction, since 60 × 4 = 240,
1/60 = 1 × 4/60 × 4 = 4/240 - Subtract the two like fractions:
126/240 - 4/240 = 126 - 4/240 = 122/240 - After reducing the fraction, the answer is 61/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80-1/60 42/80-2/60 42/80-3/60 42/80-5/60 42/80-7/60