Subtract 15/70 from 45/6, Solve 7 3/6

Subtract 15/70 from 45/6

1^st number: 7 3/6, 2^nd number: 15/70

45/6 - 15/70 is 51/7.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 70 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 6 × 35 = 210,
45/6 = 45 × 35/6 × 35 = 1575/210
Likewise, for the 2nd fraction, since 70 × 3 = 210,
15/70 = 15 × 3/70 × 3 = 45/210
Subtract the two like fractions:
1575/210 - 45/210 = 1575 - 45/210 = 1530/210
After reducing the fraction, the answer is 51/7
In mixed form: 72/7

MathStep (Works offline)

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