Subtract 20/70 from 25/80
25/80 - 20/70 is 3/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
25/80 = 25 × 7/80 × 7 = 175/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
20/70 = 20 × 8/70 × 8 = 160/560 - Subtract the two like fractions:
175/560 - 160/560 = 175 - 160/560 = 15/560 - After reducing the fraction, the answer is 3/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/80-20/70 25/80-40/70 75/80-20/70 25/80-60/70