Add 40/90 and 72/16
1st number: 40/90, 2nd number: 4 8/16
40/90 + 72/16 is 89/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 16 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
40/90 = 40 × 8/90 × 8 = 320/720 - Likewise, for the 2nd fraction, since 16 × 45 = 720,
72/16 = 72 × 45/16 × 45 = 3240/720 - Add the two like fractions:
320/720 + 3240/720 = 320 + 3240/720 = 3560/720 - 3560/720 simplified gives 89/18
- So, 40/90 + 72/16 = 89/18
In mixed form: 417/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90+72/16 40/90+72/32 40/90+72/48 40/90+72/80