Subtract 10/75 from 40/21, Solve 1 19/21

Subtract 10/75 from 40/21

1^st number: 1 19/21, 2^nd number: 10/75

40/21 - 10/75 is 62/35.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 75 is 525

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 21 × 25 = 525,
40/21 = 40 × 25/21 × 25 = 1000/525
Likewise, for the 2nd fraction, since 75 × 7 = 525,
10/75 = 10 × 7/75 × 7 = 70/525
Subtract the two like fractions:
1000/525 - 70/525 = 1000 - 70/525 = 930/525
After reducing the fraction, the answer is 62/35
In mixed form: 127/35

MathStep (Works offline)

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