Subtract 15/90 from 16/70
16/70 - 15/90 is 13/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
16/70 = 16 × 9/70 × 9 = 144/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Subtract the two like fractions:
144/630 - 105/630 = 144 - 105/630 = 39/630 - After reducing the fraction, the answer is 13/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/70-15/90 16/70-30/90 48/70-15/90 16/70-45/90 80/70-15/90 16/70-75/90