Subtract 70/25 from 4/40, Solve 4/40

Subtract 70/25 from 4/40

1^st number: 4/40, 2^nd number: 2 20/25

4/40 - 70/25 is -27/10.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 25 is 200

Next, find the equivalent fraction of both fractional numbers with denominator 200
For the 1st fraction, since 40 × 5 = 200,
4/40 = 4 × 5/40 × 5 = 20/200
Likewise, for the 2nd fraction, since 25 × 8 = 200,
70/25 = 70 × 8/25 × 8 = 560/200
Subtract the two like fractions:
20/200 - 560/200 = 20 - 560/200 = -540/200
After reducing the fraction, the answer is -27/10

MathStep (Works offline)

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