Add 12/84 and 63/90
12/84 + 63/90 is 59/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
12/84 = 12 × 15/84 × 15 = 180/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
63/90 = 63 × 14/90 × 14 = 882/1260 - Add the two like fractions:
180/1260 + 882/1260 = 180 + 882/1260 = 1062/1260 - 1062/1260 simplified gives 59/70
- So, 12/84 + 63/90 = 59/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84+63/90 36/84+63/90 60/84+63/90