Subtract 70/42 from 2/45, Solve 2/45

Subtract 70/42 from 2/45

1^st number: 2/45, 2^nd number: 1 28/42

2/45 - 70/42 is -73/45.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 45 × 14 = 630,
2/45 = 2 × 14/45 × 14 = 28/630
Likewise, for the 2nd fraction, since 42 × 15 = 630,
70/42 = 70 × 15/42 × 15 = 1050/630
Subtract the two like fractions:
28/630 - 1050/630 = 28 - 1050/630 = -1022/630
After reducing the fraction, the answer is -73/45

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