The answer is 23/93. We Multiply and use the second fraction's reciprocal which becomes 5/31 multiplied by 23/15. 15 and 5 are common factors and we simplify them which turns 5 into 1 and 15 to 3. 23 multiplied by 1 is 23 and 31 multiplied by 3 turns to 93. This equals our final answer 23/93