Solutions by everydaycalculation.com

15 - 89 is -3145.

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

LCM of 5 and 9 is**45**

Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,

15 = 1 × 95 × 9 = 945 - Likewise, for the 2nd fraction, since 9 × 5 = 45,

89 = 8 × 59 × 5 = 4045 - Subtract the two like fractions:

945 - 4045 = 9 - 4045 = -3145

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:

Android and iPhone/ iPad

Related: ^{2}/_{5}-^{8}/_{9} ^{1}/_{5}-^{16}/_{9} ^{1}/_{10}-^{8}/_{9} ^{1}/_{5}-^{8}/_{18} ^{3}/_{5}-^{8}/_{9} ^{1}/_{5}-^{24}/_{9} ^{1}/_{15}-^{8}/_{9} ^{1}/_{5}-^{8}/_{27} ^{1}/_{5}-^{40}/_{9} ^{1}/_{25}-^{8}/_{9} ^{1}/_{5}-^{8}/_{45} ^{7}/_{5}-^{8}/_{9} ^{1}/_{5}-^{56}/_{9} ^{1}/_{35}-^{8}/_{9} ^{1}/_{5}-^{8}/_{63}

© everydaycalculation.com