Subtract 45/42 from 28/25, Solve 1 3/25

Subtract 45/42 from 28/25

1^st number: 1 3/25, 2^nd number: 1 3/42

28/25 - 45/42 is 17/350.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 42 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 25 × 42 = 1050,
28/25 = 28 × 42/25 × 42 = 1176/1050
Likewise, for the 2nd fraction, since 42 × 25 = 1050,
45/42 = 45 × 25/42 × 25 = 1125/1050
Subtract the two like fractions:
1176/1050 - 1125/1050 = 1176 - 1125/1050 = 51/1050
After reducing the fraction, the answer is 17/350

MathStep (Works offline)

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