Subtract 2/80 from 80/4, Solve 20 0/4

Subtract 2/80 from 80/4

1^st number: 20 0/4, 2^nd number: 2/80

80/4 - 2/80 is 799/40.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80

Next, find the equivalent fraction of both fractional numbers with denominator 80
For the 1st fraction, since 4 × 20 = 80,
80/4 = 80 × 20/4 × 20 = 1600/80
Likewise, for the 2nd fraction, since 80 × 1 = 80,
2/80 = 2 × 1/80 × 1 = 2/80
Subtract the two like fractions:
1600/80 - 2/80 = 1600 - 2/80 = 1598/80
After reducing the fraction, the answer is 799/40
In mixed form: 1939/40

MathStep (Works offline)

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