Subtract 72/10 from 45/84
1st number: 45/84, 2nd number: 7 2/10
45/84 - 72/10 is -933/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 10 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
45/84 = 45 × 5/84 × 5 = 225/420 - Likewise, for the 2nd fraction, since 10 × 42 = 420,
72/10 = 72 × 42/10 × 42 = 3024/420 - Subtract the two like fractions:
225/420 - 3024/420 = 225 - 3024/420 = -2799/420 - After reducing the fraction, the answer is -933/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84-72/10 45/84-72/20 45/84-72/30 45/84-72/50 45/84-72/70