Add 90/70 and 25/40
1st number: 1 20/70, 2nd number: 25/40
90/70 + 25/40 is 107/56.
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,
90/70 = 90 × 4/70 × 4 = 360/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
25/40 = 25 × 7/40 × 7 = 175/280 - Add the two like fractions:
360/280 + 175/280 = 360 + 175/280 = 535/280 - 535/280 simplified gives 107/56
- So, 90/70 + 25/40 = 107/56
In mixed form: 151/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+50/40 90/70+25/80 90/70+75/40