Subtract 7/10 from 16/81
16/81 - 7/10 is -407/810.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 10 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
16/81 = 16 × 10/81 × 10 = 160/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
7/10 = 7 × 81/10 × 81 = 567/810 - Subtract the two like fractions:
160/810 - 567/810 = 160 - 567/810 = -407/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/81-7/10 16/81-14/10 16/81-7/20 48/81-7/10 16/81-21/10 16/81-7/30 80/81-7/10 16/81-35/10 16/81-7/50 16/81-49/10 16/81-7/70