Add 72/42 and 10/45
1st number: 1 30/42, 2nd number: 10/45
72/42 + 10/45 is 122/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
72/42 = 72 × 15/42 × 15 = 1080/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
10/45 = 10 × 14/45 × 14 = 140/630 - Add the two like fractions:
1080/630 + 140/630 = 1080 + 140/630 = 1220/630 - 1220/630 simplified gives 122/63
- So, 72/42 + 10/45 = 122/63
In mixed form: 159/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+20/45 72/84+10/45 72/42+10/90 72/42+30/45 72/42+50/45 72/42+70/45