Add 70/80 and 3/30
70/80 + 3/30 is 39/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
70/80 = 70 × 3/80 × 3 = 210/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
3/30 = 3 × 8/30 × 8 = 24/240 - Add the two like fractions:
210/240 + 24/240 = 210 + 24/240 = 234/240 - 234/240 simplified gives 39/40
- So, 70/80 + 3/30 = 39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/80+6/30 70/80+3/60 70/80+9/30 70/80+3/90 70/80+15/30 70/80+21/30