Add 25/20 and 90/7
1st number: 1 5/20, 2nd number: 12 6/7
25/20 + 90/7 is 395/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
25/20 = 25 × 7/20 × 7 = 175/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
90/7 = 90 × 20/7 × 20 = 1800/140 - Add the two like fractions:
175/140 + 1800/140 = 175 + 1800/140 = 1975/140 - 1975/140 simplified gives 395/28
- So, 25/20 + 90/7 = 395/28
In mixed form: 143/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/20+90/7 25/40+90/7 25/20+90/14 75/20+90/7 25/60+90/7 25/20+90/21 25/20+90/35 25/20+90/49