Subtract 60/70 from 75/45
1st number: 1 30/45, 2nd number: 60/70
75/45 - 60/70 is 17/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
75/45 = 75 × 14/45 × 14 = 1050/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
60/70 = 60 × 9/70 × 9 = 540/630 - Subtract the two like fractions:
1050/630 - 540/630 = 1050 - 540/630 = 510/630 - After reducing the fraction, the answer is 17/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/90-60/70