Subtract 15/90 from 70/40
1st number: 1 30/40, 2nd number: 15/90
70/40 - 15/90 is 19/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
70/40 = 70 × 9/40 × 9 = 630/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
15/90 = 15 × 4/90 × 4 = 60/360 - Subtract the two like fractions:
630/360 - 60/360 = 630 - 60/360 = 570/360 - After reducing the fraction, the answer is 19/12
- In mixed form: 17/12
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