Subtract 30/32 from 42/20
1st number: 2 2/20, 2nd number: 30/32
42/20 - 30/32 is 93/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 32 is 160
Next, find the equivalent fraction of both fractional numbers with denominator 160 - For the 1st fraction, since 20 × 8 = 160,
42/20 = 42 × 8/20 × 8 = 336/160 - Likewise, for the 2nd fraction, since 32 × 5 = 160,
30/32 = 30 × 5/32 × 5 = 150/160 - Subtract the two like fractions:
336/160 - 150/160 = 336 - 150/160 = 186/160 - After reducing the fraction, the answer is 93/80
- In mixed form: 113/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-30/32 42/20-60/32 42/40-30/32 42/20-30/64 42/20-90/32 42/60-30/32 42/20-30/96