Add 72/40 and 25/42
1st number: 1 32/40, 2nd number: 25/42
72/40 + 25/42 is 503/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
72/40 = 72 × 21/40 × 21 = 1512/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
25/42 = 25 × 20/42 × 20 = 500/840 - Add the two like fractions:
1512/840 + 500/840 = 1512 + 500/840 = 2012/840 - 2012/840 simplified gives 503/210
- So, 72/40 + 25/42 = 503/210
In mixed form: 283/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+50/42 72/80+25/42 72/40+25/84 72/40+75/42