Add 3/7 and 72/45
1st number: 3/7, 2nd number: 1 27/45
3/7 + 72/45 is 71/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
3/7 = 3 × 45/7 × 45 = 135/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
72/45 = 72 × 7/45 × 7 = 504/315 - Add the two like fractions:
135/315 + 504/315 = 135 + 504/315 = 639/315 - 639/315 simplified gives 71/35
- So, 3/7 + 72/45 = 71/35
In mixed form: 21/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7+72/45 3/14+72/45 3/7+72/90 9/7+72/45 3/21+72/45 15/7+72/45 3/35+72/45 21/7+72/45 3/49+72/45