Add 84/70 and 90/40
1st number: 1 14/70, 2nd number: 2 10/40
84/70 + 90/40 is 69/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
84/70 = 84 × 4/70 × 4 = 336/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
90/40 = 90 × 7/40 × 7 = 630/280 - Add the two like fractions:
336/280 + 630/280 = 336 + 630/280 = 966/280 - 966/280 simplified gives 69/20
- So, 84/70 + 90/40 = 69/20
In mixed form: 39/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70+90/80