Add 70/84 and 2/20
70/84 + 2/20 is 14/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
70/84 = 70 × 5/84 × 5 = 350/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
2/20 = 2 × 21/20 × 21 = 42/420 - Add the two like fractions:
350/420 + 42/420 = 350 + 42/420 = 392/420 - 392/420 simplified gives 14/15
- So, 70/84 + 2/20 = 14/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84+4/20 70/84+2/40 70/84+6/20 70/84+2/60 70/84+10/20 70/84+14/20