Add 54/63 and 28/40
54/63 + 28/40 is 109/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 40 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 63 × 40 = 2520,
54/63 = 54 × 40/63 × 40 = 2160/2520 - Likewise, for the 2nd fraction, since 40 × 63 = 2520,
28/40 = 28 × 63/40 × 63 = 1764/2520 - Add the two like fractions:
2160/2520 + 1764/2520 = 2160 + 1764/2520 = 3924/2520 - 3924/2520 simplified gives 109/70
- So, 54/63 + 28/40 = 109/70
In mixed form: 139/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/63+56/40 54/63+28/80 54/63+84/40