Add 72/10 and 70/45
1st number: 7 2/10, 2nd number: 1 25/45
72/10 + 70/45 is 394/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
72/10 = 72 × 9/10 × 9 = 648/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
70/45 = 70 × 2/45 × 2 = 140/90 - Add the two like fractions:
648/90 + 140/90 = 648 + 140/90 = 788/90 - 788/90 simplified gives 394/45
- So, 72/10 + 70/45 = 394/45
In mixed form: 834/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+70/45 72/10+70/90 72/30+70/45 72/50+70/45 72/70+70/45