Subtract 5/40 from 90/45
1st number: 2 0/45, 2nd number: 5/40
90/45 - 5/40 is 15/8.
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,
90/45 = 90 × 8/45 × 8 = 720/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
5/40 = 5 × 9/40 × 9 = 45/360 - Subtract the two like fractions:
720/360 - 45/360 = 720 - 45/360 = 675/360 - After reducing the fraction, the answer is 15/8
- In mixed form: 17/8
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