Subtract 20/60 from 75/70, Solve 1 5/70

Subtract 20/60 from 75/70

1^st number: 1 5/70, 2^nd number: 20/60

75/70 - 20/60 is 31/42.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 70 × 6 = 420,
75/70 = 75 × 6/70 × 6 = 450/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
20/60 = 20 × 7/60 × 7 = 140/420
Subtract the two like fractions:
450/420 - 140/420 = 450 - 140/420 = 310/420
After reducing the fraction, the answer is 31/42

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