Answer:
1/10
Step-by-step explanation:
2/5 a cup of sugar
1/2 a cup of flour
-Convert to 10ths:
4/10 of sugar, and 5/10 of flour.
Luke used 1/10 more flour than sugar.
1.67 this is rounded but original is just endless 6
1 6/9
1 2/3
1.66
Hopes this help please mark brainliest