Add 40/90 and 72/56
1st number: 40/90, 2nd number: 1 16/56
40/90 + 72/56 is 109/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
40/90 = 40 × 28/90 × 28 = 1120/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
72/56 = 72 × 45/56 × 45 = 3240/2520 - Add the two like fractions:
1120/2520 + 3240/2520 = 1120 + 3240/2520 = 4360/2520 - 4360/2520 simplified gives 109/63
- So, 40/90 + 72/56 = 109/63
In mixed form: 146/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90+72/56