Add 90/75 and 30/40
1st number: 1 15/75, 2nd number: 30/40
90/75 + 30/40 is 39/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 40 is 600
Next, find the equivalent fraction of both fractional numbers with denominator 600 - For the 1st fraction, since 75 × 8 = 600,
90/75 = 90 × 8/75 × 8 = 720/600 - Likewise, for the 2nd fraction, since 40 × 15 = 600,
30/40 = 30 × 15/40 × 15 = 450/600 - Add the two like fractions:
720/600 + 450/600 = 720 + 450/600 = 1170/600 - 1170/600 simplified gives 39/20
- So, 90/75 + 30/40 = 39/20
In mixed form: 119/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/75+60/40 90/75+30/80 90/75+90/40