Add 25/70 and 90/40
1st number: 25/70, 2nd number: 2 10/40
25/70 + 90/40 is 73/28.
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,
25/70 = 25 × 4/70 × 4 = 100/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
90/40 = 90 × 7/40 × 7 = 630/280 - Add the two like fractions:
100/280 + 630/280 = 100 + 630/280 = 730/280 - 730/280 simplified gives 73/28
- So, 25/70 + 90/40 = 73/28
In mixed form: 217/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/70+90/40 25/70+90/80 75/70+90/40