Add 63/12 and 90/70
1st number: 5 3/12, 2nd number: 1 20/70
63/12 + 90/70 is 183/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
63/12 = 63 × 35/12 × 35 = 2205/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
90/70 = 90 × 6/70 × 6 = 540/420 - Add the two like fractions:
2205/420 + 540/420 = 2205 + 540/420 = 2745/420 - 2745/420 simplified gives 183/28
- So, 63/12 + 90/70 = 183/28
In mixed form: 615/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/24+90/70 63/36+90/70 63/60+90/70 63/84+90/70