Subtract 70/40 from 12/45
1st number: 12/45, 2nd number: 1 30/40
12/45 - 70/40 is -89/60.
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,
12/45 = 12 × 8/45 × 8 = 96/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
70/40 = 70 × 9/40 × 9 = 630/360 - Subtract the two like fractions:
96/360 - 630/360 = 96 - 630/360 = -534/360 - After reducing the fraction, the answer is -89/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/45-70/40 12/90-70/40 12/45-70/80 36/45-70/40 60/45-70/40 84/45-70/40