Add 20/45 and 72/7
1st number: 20/45, 2nd number: 10 2/7
20/45 + 72/7 is 676/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
20/45 = 20 × 7/45 × 7 = 140/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
72/7 = 72 × 45/7 × 45 = 3240/315 - Add the two like fractions:
140/315 + 3240/315 = 140 + 3240/315 = 3380/315 - 3380/315 simplified gives 676/63
- So, 20/45 + 72/7 = 676/63
In mixed form: 1046/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+72/7 20/90+72/7 20/45+72/14 60/45+72/7 20/45+72/21 20/45+72/35 20/45+72/49