Add 72/63 and 81/40
1st number: 1 9/63, 2nd number: 2 1/40
72/63 + 81/40 is 887/280.
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,
72/63 = 72 × 40/63 × 40 = 2880/2520 - Likewise, for the 2nd fraction, since 40 × 63 = 2520,
81/40 = 81 × 63/40 × 63 = 5103/2520 - Add the two like fractions:
2880/2520 + 5103/2520 = 2880 + 5103/2520 = 7983/2520 - 7983/2520 simplified gives 887/280
- So, 72/63 + 81/40 = 887/280
In mixed form: 347/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/63+81/80