Subtract 45/7 from 30/50, Solve 30/50

Subtract 45/7 from 30/50

1^st number: 30/50, 2^nd number: 6 3/7

30/50 - 45/7 is -204/35.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 7 is 350

Next, find the equivalent fraction of both fractional numbers with denominator 350
For the 1st fraction, since 50 × 7 = 350,
30/50 = 30 × 7/50 × 7 = 210/350
Likewise, for the 2nd fraction, since 7 × 50 = 350,
45/7 = 45 × 50/7 × 50 = 2250/350
Subtract the two like fractions:
210/350 - 2250/350 = 210 - 2250/350 = -2040/350
After reducing the fraction, the answer is -204/35

MathStep (Works offline)

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