Add 18/90 and 63/84
18/90 + 63/84 is 19/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 84 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
18/90 = 18 × 14/90 × 14 = 252/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
63/84 = 63 × 15/84 × 15 = 945/1260 - Add the two like fractions:
252/1260 + 945/1260 = 252 + 945/1260 = 1197/1260 - 1197/1260 simplified gives 19/20
- So, 18/90 + 63/84 = 19/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/90+63/84 54/90+63/84