Add 21/7 and 1/45
1st number: 3 0/7, 2nd number: 1/45
21/7 + 1/45 is 136/45.
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,
21/7 = 21 × 45/7 × 45 = 945/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
1/45 = 1 × 7/45 × 7 = 7/315 - Add the two like fractions:
945/315 + 7/315 = 945 + 7/315 = 952/315 - 952/315 simplified gives 136/45
- So, 21/7 + 1/45 = 136/45
In mixed form: 31/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+1/45 21/7+2/45 21/14+1/45 21/7+1/90 63/7+1/45 21/7+3/45 21/7+5/45 21/35+1/45 21/7+7/45 21/49+1/45