Subtract 2/72 from 90/42, Solve 2 6/42

Subtract 2/72 from 90/42

1^st number: 2 6/42, 2^nd number: 2/72

90/42 - 2/72 is 533/252.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 42 × 12 = 504,
90/42 = 90 × 12/42 × 12 = 1080/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
2/72 = 2 × 7/72 × 7 = 14/504
Subtract the two like fractions:
1080/504 - 14/504 = 1080 - 14/504 = 1066/504
After reducing the fraction, the answer is 533/252
In mixed form: 229/252

MathStep (Works offline)

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