Subtract 21/16 from 49/70
1st number: 49/70, 2nd number: 1 5/16
49/70 - 21/16 is -49/80.
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,
49/70 = 49 × 8/70 × 8 = 392/560 - Likewise, for the 2nd fraction, since 16 × 35 = 560,
21/16 = 21 × 35/16 × 35 = 735/560 - Subtract the two like fractions:
392/560 - 735/560 = 392 - 735/560 = -343/560 - After reducing the fraction, the answer is -49/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/70-21/16 49/70-42/16 49/70-21/32 49/70-63/16 49/70-21/48 49/70-21/80