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98.1\sin(30)-0.1\times 84.96
Multiply 10 and 9.81 to get 98.1.
98.1\times \frac{1}{2}-0.1\times 84.96
Get the value of \sin(30) from trigonometric values table.
\frac{981}{20}-0.1\times 84.96
Multiply 98.1 and \frac{1}{2} to get \frac{981}{20}.
\frac{981}{20}-8.496
Multiply 0.1 and 84.96 to get 8.496.
\frac{20277}{500}
Subtract 8.496 from \frac{981}{20} to get \frac{20277}{500}.
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