Subtract 6/42 from 63/45, Solve 1 18/45

Subtract 6/42 from 63/45

1^st number: 1 18/45, 2^nd number: 6/42

63/45 - 6/42 is 44/35.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 45 × 14 = 630,
63/45 = 63 × 14/45 × 14 = 882/630
Likewise, for the 2nd fraction, since 42 × 15 = 630,
6/42 = 6 × 15/42 × 15 = 90/630
Subtract the two like fractions:
882/630 - 90/630 = 882 - 90/630 = 792/630
After reducing the fraction, the answer is 44/35
In mixed form: 19/35

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad