Subtract 42/30 from 7/16
1st number: 7/16, 2nd number: 1 12/30
7/16 - 42/30 is -77/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 16 × 15 = 240,
7/16 = 7 × 15/16 × 15 = 105/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
42/30 = 42 × 8/30 × 8 = 336/240 - Subtract the two like fractions:
105/240 - 336/240 = 105 - 336/240 = -231/240 - After reducing the fraction, the answer is -77/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/16-42/30 7/16-84/30 7/32-42/30 7/16-42/60 21/16-42/30 7/48-42/30 7/16-42/90 35/16-42/30 7/80-42/30 49/16-42/30