Subtract 98/40 from 84/45
1st number: 1 39/45, 2nd number: 2 18/40
84/45 - 98/40 is -7/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
84/45 = 84 × 8/45 × 8 = 672/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
98/40 = 98 × 9/40 × 9 = 882/360 - Subtract the two like fractions:
672/360 - 882/360 = 672 - 882/360 = -210/360 - After reducing the fraction, the answer is -7/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/90-98/40 84/45-98/80