Add 25/70 and 63/80
25/70 + 63/80 is 641/560.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
25/70 = 25 × 8/70 × 8 = 200/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
63/80 = 63 × 7/80 × 7 = 441/560 - Add the two like fractions:
200/560 + 441/560 = 200 + 441/560 = 641/560 - So, 25/70 + 63/80 = 641/560
In mixed form: 181/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/70+63/80 75/70+63/80