Subtract 54/40 from 9/84
1st number: 9/84, 2nd number: 1 14/40
9/84 - 54/40 is -87/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
9/84 = 9 × 10/84 × 10 = 90/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
54/40 = 54 × 21/40 × 21 = 1134/840 - Subtract the two like fractions:
90/840 - 1134/840 = 90 - 1134/840 = -1044/840 - After reducing the fraction, the answer is -87/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/84-54/40 9/84-54/80 27/84-54/40 45/84-54/40 63/84-54/40