Subtract 8/70 from 16/90
16/90 - 8/70 is 4/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
16/90 = 16 × 7/90 × 7 = 112/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
8/70 = 8 × 9/70 × 9 = 72/630 - Subtract the two like fractions:
112/630 - 72/630 = 112 - 72/630 = 40/630 - After reducing the fraction, the answer is 4/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/90-8/70 16/90-16/70 48/90-8/70 16/90-24/70 80/90-8/70 16/90-40/70 16/90-56/70