Subtract 3/30 from 90/40, Solve 2 10/40

Subtract 3/30 from 90/40

1^st number: 2 10/40, 2^nd number: 3/30

90/40 - 3/30 is 43/20.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 40 × 3 = 120,
90/40 = 90 × 3/40 × 3 = 270/120
Likewise, for the 2nd fraction, since 30 × 4 = 120,
3/30 = 3 × 4/30 × 4 = 12/120
Subtract the two like fractions:
270/120 - 12/120 = 270 - 12/120 = 258/120
After reducing the fraction, the answer is 43/20
In mixed form: 23/20

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