Solutions by everydaycalculation.com

1660 - 2135 is -13.

- Find the least common denominator or LCM of the two denominators:

LCM of 60 and 35 is**420**

Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,

1660 = 16 × 760 × 7 = 112420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,

2135 = 21 × 1235 × 12 = 252420 - Subtract the two like fractions:

112420 - 252420 = 112 - 252420 = -140420 - After reducing the fraction, the answer is -13

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