Subtract 42/80 from 84/10
1st number: 8 4/10, 2nd number: 42/80
84/10 - 42/80 is 63/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 10 × 8 = 80,
84/10 = 84 × 8/10 × 8 = 672/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Subtract the two like fractions:
672/80 - 42/80 = 672 - 42/80 = 630/80 - After reducing the fraction, the answer is 63/8
- In mixed form: 77/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-84/80 84/20-42/80 84/30-42/80 84/50-42/80 84/70-42/80