Subtract 90/18 from 72/35, Solve 2 2/35

Subtract 90/18 from 72/35

1^st number: 2 2/35, 2^nd number: 5 0/18

72/35 - 90/18 is -103/35.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 18 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 35 × 18 = 630,
72/35 = 72 × 18/35 × 18 = 1296/630
Likewise, for the 2nd fraction, since 18 × 35 = 630,
90/18 = 90 × 35/18 × 35 = 3150/630
Subtract the two like fractions:
1296/630 - 3150/630 = 1296 - 3150/630 = -1854/630
After reducing the fraction, the answer is -103/35

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