Subtract 42/8 from 63/45
1st number: 1 18/45, 2nd number: 5 2/8
63/45 - 42/8 is -77/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
63/45 = 63 × 8/45 × 8 = 504/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
42/8 = 42 × 45/8 × 45 = 1890/360 - Subtract the two like fractions:
504/360 - 1890/360 = 504 - 1890/360 = -1386/360 - After reducing the fraction, the answer is -77/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/45-84/8 63/90-42/8 63/45-42/16 63/45-42/24 63/45-42/40 63/45-42/56