Add 72/90 and 1/7
72/90 + 1/7 is 33/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
72/90 = 72 × 7/90 × 7 = 504/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
1/7 = 1 × 90/7 × 90 = 90/630 - Add the two like fractions:
504/630 + 90/630 = 504 + 90/630 = 594/630 - 594/630 simplified gives 33/35
- So, 72/90 + 1/7 = 33/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/90+2/7 72/90+1/14 72/90+3/7 72/90+1/21 72/90+5/7 72/90+1/35 72/90+1/49