Subtract 7/90 from 70/42
1st number: 1 28/42, 2nd number: 7/90
70/42 - 7/90 is 143/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
70/42 = 70 × 15/42 × 15 = 1050/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
7/90 = 7 × 7/90 × 7 = 49/630 - Subtract the two like fractions:
1050/630 - 49/630 = 1050 - 49/630 = 1001/630 - After reducing the fraction, the answer is 143/90
- In mixed form: 153/90
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