Subtract 75/20 from 70/90
1st number: 70/90, 2nd number: 3 15/20
70/90 - 75/20 is -107/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
70/90 = 70 × 2/90 × 2 = 140/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
75/20 = 75 × 9/20 × 9 = 675/180 - Subtract the two like fractions:
140/180 - 675/180 = 140 - 675/180 = -535/180 - After reducing the fraction, the answer is -107/36
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