Add 30/80 and 4/84
30/80 + 4/84 is 71/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 84 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
30/80 = 30 × 21/80 × 21 = 630/1680 - Likewise, for the 2nd fraction, since 84 × 20 = 1680,
4/84 = 4 × 20/84 × 20 = 80/1680 - Add the two like fractions:
630/1680 + 80/1680 = 630 + 80/1680 = 710/1680 - 710/1680 simplified gives 71/168
- So, 30/80 + 4/84 = 71/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80+4/84 30/80+8/84 90/80+4/84 30/80+12/84 30/80+20/84 30/80+28/84