Add 80/63 and 42/40
1st number: 1 17/63, 2nd number: 1 2/40
80/63 + 42/40 is 2923/1260.
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,
80/63 = 80 × 40/63 × 40 = 3200/2520 - Likewise, for the 2nd fraction, since 40 × 63 = 2520,
42/40 = 42 × 63/40 × 63 = 2646/2520 - Add the two like fractions:
3200/2520 + 2646/2520 = 3200 + 2646/2520 = 5846/2520 - 5846/2520 simplified gives 2923/1260
- So, 80/63 + 42/40 = 2923/1260
In mixed form: 2403/1260
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/63+84/40 80/63+42/80