Add 36/21 and 90/45
1st number: 1 15/21, 2nd number: 2 0/45
36/21 + 90/45 is 26/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
36/21 = 36 × 15/21 × 15 = 540/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
90/45 = 90 × 7/45 × 7 = 630/315 - Add the two like fractions:
540/315 + 630/315 = 540 + 630/315 = 1170/315 - 1170/315 simplified gives 26/7
- So, 36/21 + 90/45 = 26/7
In mixed form: 35/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21+90/45 36/42+90/45 36/63+90/45