Subtract 30/63 from 80/45, Solve 1 35/45

Subtract 30/63 from 80/45

1^st number: 1 35/45, 2^nd number: 30/63

80/45 - 30/63 is 82/63.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 63 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
80/45 = 80 × 7/45 × 7 = 560/315
Likewise, for the 2nd fraction, since 63 × 5 = 315,
30/63 = 30 × 5/63 × 5 = 150/315
Subtract the two like fractions:
560/315 - 150/315 = 560 - 150/315 = 410/315
After reducing the fraction, the answer is 82/63
In mixed form: 119/63

MathStep (Works offline)

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