Subtract 63/7 from 4/45, Solve 4/45

Subtract 63/7 from 4/45

1^st number: 4/45, 2^nd number: 9 0/7

4/45 - 63/7 is -401/45.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
4/45 = 4 × 7/45 × 7 = 28/315
Likewise, for the 2nd fraction, since 7 × 45 = 315,
63/7 = 63 × 45/7 × 45 = 2835/315
Subtract the two like fractions:
28/315 - 2835/315 = 28 - 2835/315 = -2807/315
After reducing the fraction, the answer is -401/45

MathStep (Works offline)

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