Add 40/70 and 15/84
40/70 + 15/84 is 3/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
40/70 = 40 × 6/70 × 6 = 240/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
15/84 = 15 × 5/84 × 5 = 75/420 - Add the two like fractions:
240/420 + 75/420 = 240 + 75/420 = 315/420 - 315/420 simplified gives 3/4
- So, 40/70 + 15/84 = 3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70+15/84 40/70+30/84 40/70+45/84 40/70+75/84