Subtract 4/63 from 70/15, Solve 4 10/15

Subtract 4/63 from 70/15

1^st number: 4 10/15, 2^nd number: 4/63

70/15 - 4/63 is 290/63.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 15 × 21 = 315,
70/15 = 70 × 21/15 × 21 = 1470/315
Likewise, for the 2nd fraction, since 63 × 5 = 315,
4/63 = 4 × 5/63 × 5 = 20/315
Subtract the two like fractions:
1470/315 - 20/315 = 1470 - 20/315 = 1450/315
After reducing the fraction, the answer is 290/63
In mixed form: 438/63

MathStep (Works offline)

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