Add 90/25 and 20/72
1st number: 3 15/25, 2nd number: 20/72
90/25 + 20/72 is 349/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 25 × 72 = 1800,
90/25 = 90 × 72/25 × 72 = 6480/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
20/72 = 20 × 25/72 × 25 = 500/1800 - Add the two like fractions:
6480/1800 + 500/1800 = 6480 + 500/1800 = 6980/1800 - 6980/1800 simplified gives 349/90
- So, 90/25 + 20/72 = 349/90
In mixed form: 379/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/25+40/72 90/50+20/72 90/25+60/72 90/75+20/72