Subtract 30/7 from 32/20, Solve 1 12/20

Subtract 30/7 from 32/20

1^st number: 1 12/20, 2^nd number: 4 2/7

32/20 - 30/7 is -94/35.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 20 × 7 = 140,
32/20 = 32 × 7/20 × 7 = 224/140
Likewise, for the 2nd fraction, since 7 × 20 = 140,
30/7 = 30 × 20/7 × 20 = 600/140
Subtract the two like fractions:
224/140 - 600/140 = 224 - 600/140 = -376/140
After reducing the fraction, the answer is -94/35

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