Add 70/20 and 1/45
1st number: 3 10/20, 2nd number: 1/45
70/20 + 1/45 is 317/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
70/20 = 70 × 9/20 × 9 = 630/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
1/45 = 1 × 4/45 × 4 = 4/180 - Add the two like fractions:
630/180 + 4/180 = 630 + 4/180 = 634/180 - 634/180 simplified gives 317/90
- So, 70/20 + 1/45 = 317/90
In mixed form: 347/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20+2/45 70/40+1/45 70/20+1/90 70/20+3/45 70/60+1/45 70/20+5/45 70/20+7/45