Add 1/56 and 42/90
1/56 + 42/90 is 407/840.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
1/56 = 1 × 45/56 × 45 = 45/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
42/90 = 42 × 28/90 × 28 = 1176/2520 - Add the two like fractions:
45/2520 + 1176/2520 = 45 + 1176/2520 = 1221/2520 - 1221/2520 simplified gives 407/840
- So, 1/56 + 42/90 = 407/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/56+42/90 1/56+84/90 3/56+42/90 5/56+42/90 7/56+42/90