Subtract 20/30 from 16/63, Solve 16/63

Subtract 20/30 from 16/63

16/63 - 20/30 is -26/63.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 30 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 63 × 10 = 630,
16/63 = 16 × 10/63 × 10 = 160/630
Likewise, for the 2nd fraction, since 30 × 21 = 630,
20/30 = 20 × 21/30 × 21 = 420/630
Subtract the two like fractions:
160/630 - 420/630 = 160 - 420/630 = -260/630
After reducing the fraction, the answer is -26/63

MathStep (Works offline)

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