Add 42/28 and 72/40
1st number: 1 14/28, 2nd number: 1 32/40
42/28 + 72/40 is 33/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
42/28 = 42 × 10/28 × 10 = 420/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
72/40 = 72 × 7/40 × 7 = 504/280 - Add the two like fractions:
420/280 + 504/280 = 420 + 504/280 = 924/280 - 924/280 simplified gives 33/10
- So, 42/28 + 72/40 = 33/10
In mixed form: 33/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28+72/40 42/56+72/40 42/28+72/80 42/84+72/40