Add 90/30 and 21/16
1st number: 3 0/30, 2nd number: 1 5/16
90/30 + 21/16 is 69/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
90/30 = 90 × 8/30 × 8 = 720/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
21/16 = 21 × 15/16 × 15 = 315/240 - Add the two like fractions:
720/240 + 315/240 = 720 + 315/240 = 1035/240 - 1035/240 simplified gives 69/16
- So, 90/30 + 21/16 = 69/16
In mixed form: 45/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+42/16 90/60+21/16 90/30+21/32 90/30+63/16 90/30+21/48 90/30+21/80