Subtract 3/16 from 21/70
21/70 - 3/16 is 9/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 16 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
21/70 = 21 × 8/70 × 8 = 168/560 - Likewise, for the 2nd fraction, since 16 × 35 = 560,
3/16 = 3 × 35/16 × 35 = 105/560 - Subtract the two like fractions:
168/560 - 105/560 = 168 - 105/560 = 63/560 - After reducing the fraction, the answer is 9/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70-3/16 21/70-6/16 21/70-3/32 63/70-3/16 21/70-9/16 21/70-3/48 21/70-15/16 21/70-3/80 21/70-21/16