Add 72/42 and 90/32
1st number: 1 30/42, 2nd number: 2 26/32
72/42 + 90/32 is 507/112.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 42 × 16 = 672,
72/42 = 72 × 16/42 × 16 = 1152/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
90/32 = 90 × 21/32 × 21 = 1890/672 - Add the two like fractions:
1152/672 + 1890/672 = 1152 + 1890/672 = 3042/672 - 3042/672 simplified gives 507/112
- So, 72/42 + 90/32 = 507/112
In mixed form: 459/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/84+90/32 72/42+90/64 72/42+90/96