Subtract 75/42 from 3/30, Solve 3/30

Subtract 75/42 from 3/30

1^st number: 3/30, 2^nd number: 1 33/42

3/30 - 75/42 is -59/35.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
3/30 = 3 × 7/30 × 7 = 21/210
Likewise, for the 2nd fraction, since 42 × 5 = 210,
75/42 = 75 × 5/42 × 5 = 375/210
Subtract the two like fractions:
21/210 - 375/210 = 21 - 375/210 = -354/210
After reducing the fraction, the answer is -59/35

MathStep (Works offline)

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