Add 90/8 and 72/40
1st number: 11 2/8, 2nd number: 1 32/40
90/8 + 72/40 is 261/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
90/8 = 90 × 5/8 × 5 = 450/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
72/40 = 72 × 1/40 × 1 = 72/40 - Add the two like fractions:
450/40 + 72/40 = 450 + 72/40 = 522/40 - 522/40 simplified gives 261/20
- So, 90/8 + 72/40 = 261/20
In mixed form: 131/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/16+72/40 90/8+72/80 90/24+72/40 90/40+72/40 90/56+72/40