Subtract 4/40 from 75/30, Solve 2 15/30

Subtract 4/40 from 75/30

1^st number: 2 15/30, 2^nd number: 4/40

75/30 - 4/40 is 12/5.

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

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 30 × 4 = 120,
75/30 = 75 × 4/30 × 4 = 300/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
4/40 = 4 × 3/40 × 3 = 12/120
Subtract the two like fractions:
300/120 - 12/120 = 300 - 12/120 = 288/120
After reducing the fraction, the answer is 12/5
In mixed form: 22/5

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