Add 70/80 and 60/90
70/80 + 60/90 is 37/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
70/80 = 70 × 9/80 × 9 = 630/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
60/90 = 60 × 8/90 × 8 = 480/720 - Add the two like fractions:
630/720 + 480/720 = 630 + 480/720 = 1110/720 - 1110/720 simplified gives 37/24
- So, 70/80 + 60/90 = 37/24
In mixed form: 113/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: