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