Subtract 18/45 from 70/84
70/84 - 18/45 is 13/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
70/84 = 70 × 15/84 × 15 = 1050/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
18/45 = 18 × 28/45 × 28 = 504/1260 - Subtract the two like fractions:
1050/1260 - 504/1260 = 1050 - 504/1260 = 546/1260 - After reducing the fraction, the answer is 13/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84-36/45 70/84-18/90 70/84-54/45 70/84-90/45