Add 42/40 and 12/63
1st number: 1 2/40, 2nd number: 12/63
42/40 + 12/63 is 521/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 40 × 63 = 2520,
42/40 = 42 × 63/40 × 63 = 2646/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
12/63 = 12 × 40/63 × 40 = 480/2520 - Add the two like fractions:
2646/2520 + 480/2520 = 2646 + 480/2520 = 3126/2520 - 3126/2520 simplified gives 521/420
- So, 42/40 + 12/63 = 521/420
In mixed form: 1101/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+12/63 42/40+24/63 42/80+12/63 42/40+36/63 42/40+60/63 42/40+84/63