Subtract 40/70 from 16/18
16/18 - 40/70 is 20/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
16/18 = 16 × 35/18 × 35 = 560/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
40/70 = 40 × 9/70 × 9 = 360/630 - Subtract the two like fractions:
560/630 - 360/630 = 560 - 360/630 = 200/630 - After reducing the fraction, the answer is 20/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/18-40/70 16/18-80/70 16/36-40/70 48/18-40/70 16/54-40/70 80/18-40/70 16/90-40/70