Subtract 42/32 from 30/84
1st number: 30/84, 2nd number: 1 10/32
30/84 - 42/32 is -107/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 84 × 8 = 672,
30/84 = 30 × 8/84 × 8 = 240/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
42/32 = 42 × 21/32 × 21 = 882/672 - Subtract the two like fractions:
240/672 - 882/672 = 240 - 882/672 = -642/672 - After reducing the fraction, the answer is -107/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/84-42/32 30/84-84/32 30/84-42/64 90/84-42/32 30/84-42/96