Add 4/70 and 30/80
4/70 + 30/80 is 121/280.
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,
4/70 = 4 × 8/70 × 8 = 32/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
30/80 = 30 × 7/80 × 7 = 210/560 - Add the two like fractions:
32/560 + 210/560 = 32 + 210/560 = 242/560 - 242/560 simplified gives 121/280
- So, 4/70 + 30/80 = 121/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/70+30/80 4/70+60/80 12/70+30/80 4/70+90/80 20/70+30/80 28/70+30/80