Subtract 70/36 from 42/63
1st number: 42/63, 2nd number: 1 34/36
42/63 - 70/36 is -23/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
42/63 = 42 × 4/63 × 4 = 168/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
70/36 = 70 × 7/36 × 7 = 490/252 - Subtract the two like fractions:
168/252 - 490/252 = 168 - 490/252 = -322/252 - After reducing the fraction, the answer is -23/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63-70/36 42/63-70/72