Add 21/63 and 8/27
21/63 + 8/27 is 17/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 63 × 3 = 189,
21/63 = 21 × 3/63 × 3 = 63/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
8/27 = 8 × 7/27 × 7 = 56/189 - Add the two like fractions:
63/189 + 56/189 = 63 + 56/189 = 119/189 - 119/189 simplified gives 17/27
- So, 21/63 + 8/27 = 17/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63+8/27 21/63+16/27 21/63+8/54 21/63+24/27 21/63+8/81 21/63+40/27 21/63+56/27